Finding the Fourth Proportional to 3,858,788,820.42, 5,325,131,196.58 and 2,165,009,643.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,858,788,820.42 : 5,325,131,196.58 = 2,165,009,643.78 : x
2. Step 2: Convert to fraction form
   3,858,788,820.42/5,325,131,196.58 = 2,165,009,643.78/x
3. Step 3: Cross multiply
   3,858,788,820.42x = 5,325,131,196.58 × 2,165,009,643.78
4. Step 4: Simplify right side
   3,858,788,820.42x = 11,528,960,394,989,432,832
5. Step 5: Solve for x
   x = 11,528,960,394,989,432,832/3,858,788,820.42
6. Step 6: Final answer
   x = 2,987,714,780.86