Finding the Fourth Proportional to 90,342.72, 135,489.60 and 37,741.20

Step by Step Solution

1. Step 1: Write the proportion equation
   90,342.72 : 135,489.60 = 37,741.20 : x
2. Step 2: Convert to fraction form
   90,342.72/135,489.60 = 37,741.20/x
3. Step 3: Cross multiply
   90,342.72x = 135,489.60 × 37,741.20
4. Step 4: Simplify right side
   90,342.72x = 5,113,540,091.52
5. Step 5: Solve for x
   x = 5,113,540,091.52/90,342.72
6. Step 6: Final answer
   x = 56,601.57