Finding the Fourth Proportional to 90,131.88, 135,213.98 and 30,952.20

Step by Step Solution

1. Step 1: Write the proportion equation
   90,131.88 : 135,213.98 = 30,952.20 : x
2. Step 2: Convert to fraction form
   90,131.88/135,213.98 = 30,952.20/x
3. Step 3: Cross multiply
   90,131.88x = 135,213.98 × 30,952.20
4. Step 4: Simplify right side
   90,131.88x = 4,185,170,151.76
5. Step 5: Solve for x
   x = 4,185,170,151.76/90,131.88
6. Step 6: Final answer
   x = 46,433.85