Finding the Fourth Proportional to 99,064.27, 136,708.69 and 56,623.71

Step by Step Solution

1. Step 1: Write the proportion equation
   99,064.27 : 136,708.69 = 56,623.71 : x
2. Step 2: Convert to fraction form
   99,064.27/136,708.69 = 56,623.71/x
3. Step 3: Cross multiply
   99,064.27x = 136,708.69 × 56,623.71
4. Step 4: Simplify right side
   99,064.27x = 7,740,952,766.07
5. Step 5: Solve for x
   x = 7,740,952,766.07/99,064.27
6. Step 6: Final answer
   x = 78,140.72