Finding the Fourth Proportional to 99,705.62, 137,591.57 and 54,993.62

Step by Step Solution

1. Step 1: Write the proportion equation
   99,705.62 : 137,591.57 = 54,993.62 : x
2. Step 2: Convert to fraction form
   99,705.62/137,591.57 = 54,993.62/x
3. Step 3: Cross multiply
   99,705.62x = 137,591.57 × 54,993.62
4. Step 4: Simplify right side
   99,705.62x = 7,566,658,515.78
5. Step 5: Solve for x
   x = 7,566,658,515.78/99,705.62
6. Step 6: Final answer
   x = 75,889.99