Finding the Fourth Proportional to 70.88, 106.18 and 42.00

Step by Step Solution

1. Step 1: Write the proportion equation
   70.88 : 106.18 = 42.00 : x
2. Step 2: Convert to fraction form
   70.88/106.18 = 42.00/x
3. Step 3: Cross multiply
   70.88x = 106.18 × 42.00
4. Step 4: Simplify right side
   70.88x = 4,459.06
5. Step 5: Solve for x
   x = 4,459.06/70.88
6. Step 6: Final answer
   x = 62.91