Finding the Fourth Proportional to 108,379.28, 149,570.52 and 60,640.88

Step by Step Solution

1. Step 1: Write the proportion equation
   108,379.28 : 149,570.52 = 60,640.88 : x
2. Step 2: Convert to fraction form
   108,379.28/149,570.52 = 60,640.88/x
3. Step 3: Cross multiply
   108,379.28x = 149,570.52 × 60,640.88
4. Step 4: Simplify right side
   108,379.28x = 9,070,087,954.86
5. Step 5: Solve for x
   x = 9,070,087,954.86/108,379.28
6. Step 6: Final answer
   x = 83,688.39