Finding the Fourth Proportional to 43.14, 64.72 and 42.46

Step by Step Solution

1. Step 1: Write the proportion equation
   43.14 : 64.72 = 42.46 : x
2. Step 2: Convert to fraction form
   43.14/64.72 = 42.46/x
3. Step 3: Cross multiply
   43.14x = 64.72 × 42.46
4. Step 4: Simplify right side
   43.14x = 2,748.01
5. Step 5: Solve for x
   x = 2,748.01/43.14
6. Step 6: Final answer
   x = 63.70