Finding the Fourth Proportional to 465,831.61, 642,870.42 and 261,946.72

Step by Step Solution

1. Step 1: Write the proportion equation
   465,831.61 : 642,870.42 = 261,946.72 : x
2. Step 2: Convert to fraction form
   465,831.61/642,870.42 = 261,946.72/x
3. Step 3: Cross multiply
   465,831.61x = 642,870.42 × 261,946.72
4. Step 4: Simplify right side
   465,831.61x = 168,397,794,689.67
5. Step 5: Solve for x
   x = 168,397,794,689.67/465,831.61
6. Step 6: Final answer
   x = 361,499.29