Finding the Fourth Proportional to 42.35, 63.06 and 42.15

Step by Step Solution

1. Step 1: Write the proportion equation
   42.35 : 63.06 = 42.15 : x
2. Step 2: Convert to fraction form
   42.35/63.06 = 42.15/x
3. Step 3: Cross multiply
   42.35x = 63.06 × 42.15
4. Step 4: Simplify right side
   42.35x = 2,657.98
5. Step 5: Solve for x
   x = 2,657.98/42.35
6. Step 6: Final answer
   x = 62.77