Finding the Fourth Proportional to 111,507.71, 153,810.65 and 66,153.59

Step by Step Solution

1. Step 1: Write the proportion equation
   111,507.71 : 153,810.65 = 66,153.59 : x
2. Step 2: Convert to fraction form
   111,507.71/153,810.65 = 66,153.59/x
3. Step 3: Cross multiply
   111,507.71x = 153,810.65 × 66,153.59
4. Step 4: Simplify right side
   111,507.71x = 10,175,126,264.78
5. Step 5: Solve for x
   x = 10,175,126,264.78/111,507.71
6. Step 6: Final answer
   x = 91,250.43