Finding the Fourth Proportional to 90,499.12, 124,445.91 and 78,541.69

Step by Step Solution

1. Step 1: Write the proportion equation
   90,499.12 : 124,445.91 = 78,541.69 : x
2. Step 2: Convert to fraction form
   90,499.12/124,445.91 = 78,541.69/x
3. Step 3: Cross multiply
   90,499.12x = 124,445.91 × 78,541.69
4. Step 4: Simplify right side
   90,499.12x = 9,774,192,494.28
5. Step 5: Solve for x
   x = 9,774,192,494.28/90,499.12
6. Step 6: Final answer
   x = 108,003.18