Finding the Fourth Proportional to 111,258.72, 153,539.28 and 60,960.96

Step by Step Solution

1. Step 1: Write the proportion equation
   111,258.72 : 153,539.28 = 60,960.96 : x
2. Step 2: Convert to fraction form
   111,258.72/153,539.28 = 60,960.96/x
3. Step 3: Cross multiply
   111,258.72x = 153,539.28 × 60,960.96
4. Step 4: Simplify right side
   111,258.72x = 9,359,901,906.51
5. Step 5: Solve for x
   x = 9,359,901,906.51/111,258.72
6. Step 6: Final answer
   x = 84,127.36