Finding the Fourth Proportional to 91,932.80, 137,960.76 and 39,355.16

Step by Step Solution

1. Step 1: Write the proportion equation
   91,932.80 : 137,960.76 = 39,355.16 : x
2. Step 2: Convert to fraction form
   91,932.80/137,960.76 = 39,355.16/x
3. Step 3: Cross multiply
   91,932.80x = 137,960.76 × 39,355.16
4. Step 4: Simplify right side
   91,932.80x = 5,429,467,783.52
5. Step 5: Solve for x
   x = 5,429,467,783.52/91,932.80
6. Step 6: Final answer
   x = 59,059.09