Finding the Fourth Proportional to 91,339.20, 137,034.72 and 55,355.76

Step by Step Solution

1. Step 1: Write the proportion equation
   91,339.20 : 137,034.72 = 55,355.76 : x
2. Step 2: Convert to fraction form
   91,339.20/137,034.72 = 55,355.76/x
3. Step 3: Cross multiply
   91,339.20x = 137,034.72 × 55,355.76
4. Step 4: Simplify right side
   91,339.20x = 7,585,661,071.99
5. Step 5: Solve for x
   x = 7,585,661,071.99/91,339.20
6. Step 6: Final answer
   x = 83,049.35