Finding the Fourth Proportional to 111,025.28, 153,215.52 and 65,702.72

Step by Step Solution

1. Step 1: Write the proportion equation
   111,025.28 : 153,215.52 = 65,702.72 : x
2. Step 2: Convert to fraction form
   111,025.28/153,215.52 = 65,702.72/x
3. Step 3: Cross multiply
   111,025.28x = 153,215.52 × 65,702.72
4. Step 4: Simplify right side
   111,025.28x = 10,066,676,410.21
5. Step 5: Solve for x
   x = 10,066,676,410.21/111,025.28
6. Step 6: Final answer
   x = 90,670.13