Finding the Fourth Proportional to 99,790.69, 137,734.29 and 65,805.32

Step by Step Solution

1. Step 1: Write the proportion equation
   99,790.69 : 137,734.29 = 65,805.32 : x
2. Step 2: Convert to fraction form
   99,790.69/137,734.29 = 65,805.32/x
3. Step 3: Cross multiply
   99,790.69x = 137,734.29 × 65,805.32
4. Step 4: Simplify right side
   99,790.69x = 9,063,648,092.98
5. Step 5: Solve for x
   x = 9,063,648,092.98/99,790.69
6. Step 6: Final answer
   x = 90,826.59