Finding the Fourth Proportional to 90,040.52, 135,070.20 and 30,880.96

Step by Step Solution

1. Step 1: Write the proportion equation
   90,040.52 : 135,070.20 = 30,880.96 : x
2. Step 2: Convert to fraction form
   90,040.52/135,070.20 = 30,880.96/x
3. Step 3: Cross multiply
   90,040.52x = 135,070.20 × 30,880.96
4. Step 4: Simplify right side
   90,040.52x = 4,171,097,105.72
5. Step 5: Solve for x
   x = 4,171,097,105.72/90,040.52
6. Step 6: Final answer
   x = 46,324.67