Finding the Fourth Proportional to 89,867.78, 134,789.92 and 26,686.61

Step by Step Solution

1. Step 1: Write the proportion equation
   89,867.78 : 134,789.92 = 26,686.61 : x
2. Step 2: Convert to fraction form
   89,867.78/134,789.92 = 26,686.61/x
3. Step 3: Cross multiply
   89,867.78x = 134,789.92 × 26,686.61
4. Step 4: Simplify right side
   89,867.78x = 3,597,085,219.59
5. Step 5: Solve for x
   x = 3,597,085,219.59/89,867.78
6. Step 6: Final answer
   x = 40,026.42