Finding the Fourth Proportional to 93.50, 140.16 and 42.18

Step by Step Solution

1. Step 1: Write the proportion equation
   93.50 : 140.16 = 42.18 : x
2. Step 2: Convert to fraction form
   93.50/140.16 = 42.18/x
3. Step 3: Cross multiply
   93.50x = 140.16 × 42.18
4. Step 4: Simplify right side
   93.50x = 5,911.95
5. Step 5: Solve for x
   x = 5,911.95/93.50
6. Step 6: Final answer
   x = 63.23