Finding the Fourth Proportional to 111,251.52, 153,521.52 and 65,980.80

Step by Step Solution

1. Step 1: Write the proportion equation
   111,251.52 : 153,521.52 = 65,980.80 : x
2. Step 2: Convert to fraction form
   111,251.52/153,521.52 = 65,980.80/x
3. Step 3: Cross multiply
   111,251.52x = 153,521.52 × 65,980.80
4. Step 4: Simplify right side
   111,251.52x = 10,129,472,706.82
5. Step 5: Solve for x
   x = 10,129,472,706.82/111,251.52
6. Step 6: Final answer
   x = 91,050.20