Finding the Fourth Proportional to 89.02, 133.48 and 42.10

Step by Step Solution

1. Step 1: Write the proportion equation
   89.02 : 133.48 = 42.10 : x
2. Step 2: Convert to fraction form
   89.02/133.48 = 42.10/x
3. Step 3: Cross multiply
   89.02x = 133.48 × 42.10
4. Step 4: Simplify right side
   89.02x = 5,619.51
5. Step 5: Solve for x
   x = 5,619.51/89.02
6. Step 6: Final answer
   x = 63.13