Finding the Fourth Proportional to 99,707.81, 137,647.57 and 76,995.82

Step by Step Solution

1. Step 1: Write the proportion equation
   99,707.81 : 137,647.57 = 76,995.82 : x
2. Step 2: Convert to fraction form
   99,707.81/137,647.57 = 76,995.82/x
3. Step 3: Cross multiply
   99,707.81x = 137,647.57 × 76,995.82
4. Step 4: Simplify right side
   99,707.81x = 10,598,286,834.92
5. Step 5: Solve for x
   x = 10,598,286,834.92/99,707.81
6. Step 6: Final answer
   x = 106,293.45