Finding the Fourth Proportional to 74.48, 111.72 and 71.34

Step by Step Solution

1. Step 1: Write the proportion equation
   74.48 : 111.72 = 71.34 : x
2. Step 2: Convert to fraction form
   74.48/111.72 = 71.34/x
3. Step 3: Cross multiply
   74.48x = 111.72 × 71.34
4. Step 4: Simplify right side
   74.48x = 7,970.10
5. Step 5: Solve for x
   x = 7,970.10/74.48
6. Step 6: Final answer
   x = 107.01