Finding the Fourth Proportional to 90,086.31, 124,328.01 and 77,381.36

Step by Step Solution

1. Step 1: Write the proportion equation
   90,086.31 : 124,328.01 = 77,381.36 : x
2. Step 2: Convert to fraction form
   90,086.31/124,328.01 = 77,381.36/x
3. Step 3: Cross multiply
   90,086.31x = 124,328.01 × 77,381.36
4. Step 4: Simplify right side
   90,086.31x = 9,620,669,878.25
5. Step 5: Solve for x
   x = 9,620,669,878.25/90,086.31
6. Step 6: Final answer
   x = 106,793.92