Finding the Fourth Proportional to 111,272.88, 153,532.32 and 65,928.20

Step by Step Solution

1. Step 1: Write the proportion equation
   111,272.88 : 153,532.32 = 65,928.20 : x
2. Step 2: Convert to fraction form
   111,272.88/153,532.32 = 65,928.20/x
3. Step 3: Cross multiply
   111,272.88x = 153,532.32 × 65,928.20
4. Step 4: Simplify right side
   111,272.88x = 10,122,109,499.42
5. Step 5: Solve for x
   x = 10,122,109,499.42/111,272.88
6. Step 6: Final answer
   x = 90,966.55