Finding the Fourth Proportional to 90,064.68, 135,034.56 and 40,118.28

Step by Step Solution

1. Step 1: Write the proportion equation
   90,064.68 : 135,034.56 = 40,118.28 : x
2. Step 2: Convert to fraction form
   90,064.68/135,034.56 = 40,118.28/x
3. Step 3: Cross multiply
   90,064.68x = 135,034.56 × 40,118.28
4. Step 4: Simplify right side
   90,064.68x = 5,417,354,287.76
5. Step 5: Solve for x
   x = 5,417,354,287.76/90,064.68
6. Step 6: Final answer
   x = 60,149.60