Finding the Fourth Proportional to 93.72, 140.52 and 42.30

Step by Step Solution

1. Step 1: Write the proportion equation
   93.72 : 140.52 = 42.30 : x
2. Step 2: Convert to fraction form
   93.72/140.52 = 42.30/x
3. Step 3: Cross multiply
   93.72x = 140.52 × 42.30
4. Step 4: Simplify right side
   93.72x = 5,944.00
5. Step 5: Solve for x
   x = 5,944.00/93.72
6. Step 6: Final answer
   x = 63.42