Finding the Fourth Proportional to 111,388.50, 153,716.13 and 61,087.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,388.50 : 153,716.13 = 61,087.50 : x
2. Step 2: Convert to fraction form
   111,388.50/153,716.13 = 61,087.50/x
3. Step 3: Cross multiply
   111,388.50x = 153,716.13 × 61,087.50
4. Step 4: Simplify right side
   111,388.50x = 9,390,134,091.38
5. Step 5: Solve for x
   x = 9,390,134,091.38/111,388.50
6. Step 6: Final answer
   x = 84,300.75