Finding the Fourth Proportional to 71.88, 99.18 and 51.10

Step by Step Solution

1. Step 1: Write the proportion equation
   71.88 : 99.18 = 51.10 : x
2. Step 2: Convert to fraction form
   71.88/99.18 = 51.10/x
3. Step 3: Cross multiply
   71.88x = 99.18 × 51.10
4. Step 4: Simplify right side
   71.88x = 5,068.10
5. Step 5: Solve for x
   x = 5,068.10/71.88
6. Step 6: Final answer
   x = 70.51