Finding the Fourth Proportional to 99,404.24, 136,988.89 and 71,060.72

Step by Step Solution

1. Step 1: Write the proportion equation
   99,404.24 : 136,988.89 = 71,060.72 : x
2. Step 2: Convert to fraction form
   99,404.24/136,988.89 = 71,060.72/x
3. Step 3: Cross multiply
   99,404.24x = 136,988.89 × 71,060.72
4. Step 4: Simplify right side
   99,404.24x = 9,734,528,292.80
5. Step 5: Solve for x
   x = 9,734,528,292.80/99,404.24
6. Step 6: Final answer
   x = 97,928.71