Finding the Fourth Proportional to 86,097.15, 128,767.98 and 76,675.89

Step by Step Solution

1. Step 1: Write the proportion equation
   86,097.15 : 128,767.98 = 76,675.89 : x
2. Step 2: Convert to fraction form
   86,097.15/128,767.98 = 76,675.89/x
3. Step 3: Cross multiply
   86,097.15x = 128,767.98 × 76,675.89
4. Step 4: Simplify right side
   86,097.15x = 9,873,399,470.00
5. Step 5: Solve for x
   x = 9,873,399,470.00/86,097.15
6. Step 6: Final answer
   x = 114,677.43