Finding the Fourth Proportional to 90,442.55, 135,726.89 and 37,138.55

Step by Step Solution

1. Step 1: Write the proportion equation
   90,442.55 : 135,726.89 = 37,138.55 : x
2. Step 2: Convert to fraction form
   90,442.55/135,726.89 = 37,138.55/x
3. Step 3: Cross multiply
   90,442.55x = 135,726.89 × 37,138.55
4. Step 4: Simplify right side
   90,442.55x = 5,040,699,026.28
5. Step 5: Solve for x
   x = 5,040,699,026.28/90,442.55
6. Step 6: Final answer
   x = 55,733.71