Finding the Fourth Proportional to 86.69, 130.10 and 59.69

Step by Step Solution

1. Step 1: Write the proportion equation
   86.69 : 130.10 = 59.69 : x
2. Step 2: Convert to fraction form
   86.69/130.10 = 59.69/x
3. Step 3: Cross multiply
   86.69x = 130.10 × 59.69
4. Step 4: Simplify right side
   86.69x = 7,764.72
5. Step 5: Solve for x
   x = 7,764.72/86.69
6. Step 6: Final answer
   x = 89.57