Finding the Fourth Proportional to 89,940.32, 134,906.48 and 30,781.28

Step by Step Solution

1. Step 1: Write the proportion equation
   89,940.32 : 134,906.48 = 30,781.28 : x
2. Step 2: Convert to fraction form
   89,940.32/134,906.48 = 30,781.28/x
3. Step 3: Cross multiply
   89,940.32x = 134,906.48 × 30,781.28
4. Step 4: Simplify right side
   89,940.32x = 4,152,594,134.69
5. Step 5: Solve for x
   x = 4,152,594,134.69/89,940.32
6. Step 6: Final answer
   x = 46,170.55