Finding the Fourth Proportional to 111,540.50, 153,928.32 and 61,239.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,540.50 : 153,928.32 = 61,239.50 : x
2. Step 2: Convert to fraction form
   111,540.50/153,928.32 = 61,239.50/x
3. Step 3: Cross multiply
   111,540.50x = 153,928.32 × 61,239.50
4. Step 4: Simplify right side
   111,540.50x = 9,426,493,352.64
5. Step 5: Solve for x
   x = 9,426,493,352.64/111,540.50
6. Step 6: Final answer
   x = 84,511.84