Finding the Fourth Proportional to 99,690.39, 137,747.52 and 79,712.01

Step by Step Solution

1. Step 1: Write the proportion equation
   99,690.39 : 137,747.52 = 79,712.01 : x
2. Step 2: Convert to fraction form
   99,690.39/137,747.52 = 79,712.01/x
3. Step 3: Cross multiply
   99,690.39x = 137,747.52 × 79,712.01
4. Step 4: Simplify right side
   99,690.39x = 10,980,131,691.72
5. Step 5: Solve for x
   x = 10,980,131,691.72/99,690.39
6. Step 6: Final answer
   x = 110,142.33