Finding the Fourth Proportional to 93.40, 140.16 and 42.10

Step by Step Solution

1. Step 1: Write the proportion equation
   93.40 : 140.16 = 42.10 : x
2. Step 2: Convert to fraction form
   93.40/140.16 = 42.10/x
3. Step 3: Cross multiply
   93.40x = 140.16 × 42.10
4. Step 4: Simplify right side
   93.40x = 5,900.04
5. Step 5: Solve for x
   x = 5,900.04/93.40
6. Step 6: Final answer
   x = 63.17