Finding the Fourth Proportional to 108,139.78, 149,231.32 and 60,393.79

Step by Step Solution

1. Step 1: Write the proportion equation
   108,139.78 : 149,231.32 = 60,393.79 : x
2. Step 2: Convert to fraction form
   108,139.78/149,231.32 = 60,393.79/x
3. Step 3: Cross multiply
   108,139.78x = 149,231.32 × 60,393.79
4. Step 4: Simplify right side
   108,139.78x = 9,012,645,001.50
5. Step 5: Solve for x
   x = 9,012,645,001.50/108,139.78
6. Step 6: Final answer
   x = 83,342.55