Finding the Fourth Proportional to 90,168.16, 124,430.88 and 49,878.72

Step by Step Solution

1. Step 1: Write the proportion equation
   90,168.16 : 124,430.88 = 49,878.72 : x
2. Step 2: Convert to fraction form
   90,168.16/124,430.88 = 49,878.72/x
3. Step 3: Cross multiply
   90,168.16x = 124,430.88 × 49,878.72
4. Step 4: Simplify right side
   90,168.16x = 6,206,453,022.87
5. Step 5: Solve for x
   x = 6,206,453,022.87/90,168.16
6. Step 6: Final answer
   x = 68,831.98