Finding the Fourth Proportional to 88,109.82, 121,423.95 and 86,490.54

Step by Step Solution

1. Step 1: Write the proportion equation
   88,109.82 : 121,423.95 = 86,490.54 : x
2. Step 2: Convert to fraction form
   88,109.82/121,423.95 = 86,490.54/x
3. Step 3: Cross multiply
   88,109.82x = 121,423.95 × 86,490.54
4. Step 4: Simplify right side
   88,109.82x = 10,502,023,004.43
5. Step 5: Solve for x
   x = 10,502,023,004.43/88,109.82
6. Step 6: Final answer
   x = 119,192.42