Finding the Fourth Proportional to 90.52, 135.82 and 42.43

Step by Step Solution

1. Step 1: Write the proportion equation
   90.52 : 135.82 = 42.43 : x
2. Step 2: Convert to fraction form
   90.52/135.82 = 42.43/x
3. Step 3: Cross multiply
   90.52x = 135.82 × 42.43
4. Step 4: Simplify right side
   90.52x = 5,762.56
5. Step 5: Solve for x
   x = 5,762.56/90.52
6. Step 6: Final answer
   x = 63.66