Finding the Fourth Proportional to 90,080.76, 135,128.04 and 30,915.96

Step by Step Solution

1. Step 1: Write the proportion equation
   90,080.76 : 135,128.04 = 30,915.96 : x
2. Step 2: Convert to fraction form
   90,080.76/135,128.04 = 30,915.96/x
3. Step 3: Cross multiply
   90,080.76x = 135,128.04 × 30,915.96
4. Step 4: Simplify right side
   90,080.76x = 4,177,613,079.52
5. Step 5: Solve for x
   x = 4,177,613,079.52/90,080.76
6. Step 6: Final answer
   x = 46,376.31