Finding the Fourth Proportional to 59.99, 90.29 and 51.18

Step by Step Solution

1. Step 1: Write the proportion equation
   59.99 : 90.29 = 51.18 : x
2. Step 2: Convert to fraction form
   59.99/90.29 = 51.18/x
3. Step 3: Cross multiply
   59.99x = 90.29 × 51.18
4. Step 4: Simplify right side
   59.99x = 4,620.33
5. Step 5: Solve for x
   x = 4,620.33/59.99
6. Step 6: Final answer
   x = 77.02