Finding the Fourth Proportional to 71.47, 106.72 and 56.08

Step by Step Solution

1. Step 1: Write the proportion equation
   71.47 : 106.72 = 56.08 : x
2. Step 2: Convert to fraction form
   71.47/106.72 = 56.08/x
3. Step 3: Cross multiply
   71.47x = 106.72 × 56.08
4. Step 4: Simplify right side
   71.47x = 5,985.17
5. Step 5: Solve for x
   x = 5,985.17/71.47
6. Step 6: Final answer
   x = 83.74