Finding the Fourth Proportional to 12,878,072.47, 17,767,864.56 and 7,719,551.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12,878,072.47 : 17,767,864.56 = 7,719,551.83 : x
2. Step 2: Convert to fraction form
   12,878,072.47/17,767,864.56 = 7,719,551.83/x
3. Step 3: Cross multiply
   12,878,072.47x = 17,767,864.56 × 7,719,551.83
4. Step 4: Simplify right side
   12,878,072.47x = 137,159,951,379,340.14
5. Step 5: Solve for x
   x = 137,159,951,379,340.14/12,878,072.47
6. Step 6: Final answer
   x = 10,650,658.45