Finding the Fourth Proportional to 88,112.82, 121,428.09 and 86,493.54

Step by Step Solution

1. Step 1: Write the proportion equation
   88,112.82 : 121,428.09 = 86,493.54 : x
2. Step 2: Convert to fraction form
   88,112.82/121,428.09 = 86,493.54/x
3. Step 3: Cross multiply
   88,112.82x = 121,428.09 × 86,493.54
4. Step 4: Simplify right side
   88,112.82x = 10,502,745,359.54
5. Step 5: Solve for x
   x = 10,502,745,359.54/88,112.82
6. Step 6: Final answer
   x = 119,196.56