Finding the Fourth Proportional to 99,762.01, 137,559.94 and 81,555.91

Step by Step Solution

1. Step 1: Write the proportion equation
   99,762.01 : 137,559.94 = 81,555.91 : x
2. Step 2: Convert to fraction form
   99,762.01/137,559.94 = 81,555.91/x
3. Step 3: Cross multiply
   99,762.01x = 137,559.94 × 81,555.91
4. Step 4: Simplify right side
   99,762.01x = 11,218,826,086.25
5. Step 5: Solve for x
   x = 11,218,826,086.25/99,762.01
6. Step 6: Final answer
   x = 112,455.89