Finding the Fourth Proportional to 59.51, 89.61 and 51.99

Step by Step Solution

1. Step 1: Write the proportion equation
   59.51 : 89.61 = 51.99 : x
2. Step 2: Convert to fraction form
   59.51/89.61 = 51.99/x
3. Step 3: Cross multiply
   59.51x = 89.61 × 51.99
4. Step 4: Simplify right side
   59.51x = 4,658.82
5. Step 5: Solve for x
   x = 4,658.82/59.51
6. Step 6: Final answer
   x = 78.29