Finding the Fourth Proportional to 99,735.50, 137,630.18 and 54,410.78

Step by Step Solution

1. Step 1: Write the proportion equation
   99,735.50 : 137,630.18 = 54,410.78 : x
2. Step 2: Convert to fraction form
   99,735.50/137,630.18 = 54,410.78/x
3. Step 3: Cross multiply
   99,735.50x = 137,630.18 × 54,410.78
4. Step 4: Simplify right side
   99,735.50x = 7,488,565,925.44
5. Step 5: Solve for x
   x = 7,488,565,925.44/99,735.50
6. Step 6: Final answer
   x = 75,084.26