Finding the Fourth Proportional to 371,027,057.86, 512,216,123.31 and 286,068,620.57

Step by Step Solution

1. Step 1: Write the proportion equation
   371,027,057.86 : 512,216,123.31 = 286,068,620.57 : x
2. Step 2: Convert to fraction form
   371,027,057.86/512,216,123.31 = 286,068,620.57/x
3. Step 3: Cross multiply
   371,027,057.86x = 512,216,123.31 × 286,068,620.57
4. Step 4: Simplify right side
   371,027,057.86x = 146,528,959,826,443,648
5. Step 5: Solve for x
   x = 146,528,959,826,443,648/371,027,057.86
6. Step 6: Final answer
   x = 394,927,962.05