Finding the Fourth Proportional to 498,978.47, 688,590.51 and 269,535.74

Step by Step Solution

1. Step 1: Write the proportion equation
   498,978.47 : 688,590.51 = 269,535.74 : x
2. Step 2: Convert to fraction form
   498,978.47/688,590.51 = 269,535.74/x
3. Step 3: Cross multiply
   498,978.47x = 688,590.51 × 269,535.74
4. Step 4: Simplify right side
   498,978.47x = 185,599,752,669.83
5. Step 5: Solve for x
   x = 185,599,752,669.83/498,978.47
6. Step 6: Final answer
   x = 371,959.44