Finding the Fourth Proportional to 99,506.88, 137,348.46 and 79,503.12

Step by Step Solution

1. Step 1: Write the proportion equation
   99,506.88 : 137,348.46 = 79,503.12 : x
2. Step 2: Convert to fraction form
   99,506.88/137,348.46 = 79,503.12/x
3. Step 3: Cross multiply
   99,506.88x = 137,348.46 × 79,503.12
4. Step 4: Simplify right side
   99,506.88x = 10,919,631,097.20
5. Step 5: Solve for x
   x = 10,919,631,097.20/99,506.88
6. Step 6: Final answer
   x = 109,737.45