Finding the Fourth Proportional to 71.76, 99.06 and 51.10

Step by Step Solution

1. Step 1: Write the proportion equation
   71.76 : 99.06 = 51.10 : x
2. Step 2: Convert to fraction form
   71.76/99.06 = 51.10/x
3. Step 3: Cross multiply
   71.76x = 99.06 × 51.10
4. Step 4: Simplify right side
   71.76x = 5,061.53
5. Step 5: Solve for x
   x = 5,061.53/71.76
6. Step 6: Final answer
   x = 70.53