Finding the Fourth Proportional to 382,380,878.59, 527,655,428.82 and 215,083,833.10

Step by Step Solution

1. Step 1: Write the proportion equation
   382,380,878.59 : 527,655,428.82 = 215,083,833.10 : x
2. Step 2: Convert to fraction form
   382,380,878.59/527,655,428.82 = 215,083,833.10/x
3. Step 3: Cross multiply
   382,380,878.59x = 527,655,428.82 × 215,083,833.10
4. Step 4: Simplify right side
   382,380,878.59x = 113,490,152,185,310,672
5. Step 5: Solve for x
   x = 113,490,152,185,310,672/382,380,878.59
6. Step 6: Final answer
   x = 296,798,711.81