Finding the Fourth Proportional to 499,287, 689,018.52 and 272,932.50

Step by Step Solution

1. Step 1: Write the proportion equation
   499,287 : 689,018.52 = 272,932.50 : x
2. Step 2: Convert to fraction form
   499,287/689,018.52 = 272,932.50/x
3. Step 3: Cross multiply
   499,287x = 689,018.52 × 272,932.50
4. Step 4: Simplify right side
   499,287x = 188,055,547,209.90
5. Step 5: Solve for x
   x = 188,055,547,209.90/499,287
6. Step 6: Final answer
   x = 376,648.19