Finding the Fourth Proportional to 99,868.89, 137,819.85 and 54,546.03

Step by Step Solution

1. Step 1: Write the proportion equation
   99,868.89 : 137,819.85 = 54,546.03 : x
2. Step 2: Convert to fraction form
   99,868.89/137,819.85 = 54,546.03/x
3. Step 3: Cross multiply
   99,868.89x = 137,819.85 × 54,546.03
4. Step 4: Simplify right side
   99,868.89x = 7,517,525,672.70
5. Step 5: Solve for x
   x = 7,517,525,672.70/99,868.89
6. Step 6: Final answer
   x = 75,273.95