Finding the Fourth Proportional to 90,369.55, 135,591.53 and 39,742.55

Step by Step Solution

1. Step 1: Write the proportion equation
   90,369.55 : 135,591.53 = 39,742.55 : x
2. Step 2: Convert to fraction form
   90,369.55/135,591.53 = 39,742.55/x
3. Step 3: Cross multiply
   90,369.55x = 135,591.53 × 39,742.55
4. Step 4: Simplify right side
   90,369.55x = 5,388,752,383.29
5. Step 5: Solve for x
   x = 5,388,752,383.29/90,369.55
6. Step 6: Final answer
   x = 59,630.18