Finding the Fourth Proportional to 90,443.55, 135,728.39 and 37,139.55

Step by Step Solution

1. Step 1: Write the proportion equation
   90,443.55 : 135,728.39 = 37,139.55 : x
2. Step 2: Convert to fraction form
   90,443.55/135,728.39 = 37,139.55/x
3. Step 3: Cross multiply
   90,443.55x = 135,728.39 × 37,139.55
4. Step 4: Simplify right side
   90,443.55x = 5,040,891,326.82
5. Step 5: Solve for x
   x = 5,040,891,326.82/90,443.55
6. Step 6: Final answer
   x = 55,735.22