Finding the Fourth Proportional to 9,049,322,799.78, 12,487,869,780.42 and 5,239,006,418.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,049,322,799.78 : 12,487,869,780.42 = 5,239,006,418.16 : x
2. Step 2: Convert to fraction form
   9,049,322,799.78/12,487,869,780.42 = 5,239,006,418.16/x
3. Step 3: Cross multiply
   9,049,322,799.78x = 12,487,869,780.42 × 5,239,006,418.16
4. Step 4: Simplify right side
   9,049,322,799.78x = 65,424,029,928,766,685,184
5. Step 5: Solve for x
   x = 65,424,029,928,766,685,184/9,049,322,799.78
6. Step 6: Final answer
   x = 7,229,715,568.37