Finding the Fourth Proportional to 111,489.94, 153,791.78 and 71,158.25

Step by Step Solution

1. Step 1: Write the proportion equation
   111,489.94 : 153,791.78 = 71,158.25 : x
2. Step 2: Convert to fraction form
   111,489.94/153,791.78 = 71,158.25/x
3. Step 3: Cross multiply
   111,489.94x = 153,791.78 × 71,158.25
4. Step 4: Simplify right side
   111,489.94x = 10,943,553,493.06
5. Step 5: Solve for x
   x = 10,943,553,493.06/111,489.94
6. Step 6: Final answer
   x = 98,157.32