Finding the Fourth Proportional to 499,294, 689,025.72 and 272,941.12

Step by Step Solution

1. Step 1: Write the proportion equation
   499,294 : 689,025.72 = 272,941.12 : x
2. Step 2: Convert to fraction form
   499,294/689,025.72 = 272,941.12/x
3. Step 3: Cross multiply
   499,294x = 689,025.72 × 272,941.12
4. Step 4: Simplify right side
   499,294x = 188,063,451,725.61
5. Step 5: Solve for x
   x = 188,063,451,725.61/499,294
6. Step 6: Final answer
   x = 376,658.75