Finding the Fourth Proportional to 99,601.55, 137,450.17 and 54,279.55

Step by Step Solution

1. Step 1: Write the proportion equation
   99,601.55 : 137,450.17 = 54,279.55 : x
2. Step 2: Convert to fraction form
   99,601.55/137,450.17 = 54,279.55/x
3. Step 3: Cross multiply
   99,601.55x = 137,450.17 × 54,279.55
4. Step 4: Simplify right side
   99,601.55x = 7,460,732,895.70
5. Step 5: Solve for x
   x = 7,460,732,895.70/99,601.55
6. Step 6: Final answer
   x = 74,905.79