Finding the Fourth Proportional to 111,199.92, 153,470.80 and 65,874.40

Step by Step Solution

1. Step 1: Write the proportion equation
   111,199.92 : 153,470.80 = 65,874.40 : x
2. Step 2: Convert to fraction form
   111,199.92/153,470.80 = 65,874.40/x
3. Step 3: Cross multiply
   111,199.92x = 153,470.80 × 65,874.40
4. Step 4: Simplify right side
   111,199.92x = 10,109,796,867.52
5. Step 5: Solve for x
   x = 10,109,796,867.52/111,199.92
6. Step 6: Final answer
   x = 90,915.50