Finding the Fourth Proportional to 61.23, 91.71 and 60.69

Step by Step Solution

1. Step 1: Write the proportion equation
   61.23 : 91.71 = 60.69 : x
2. Step 2: Convert to fraction form
   61.23/91.71 = 60.69/x
3. Step 3: Cross multiply
   61.23x = 91.71 × 60.69
4. Step 4: Simplify right side
   61.23x = 5,565.88
5. Step 5: Solve for x
   x = 5,565.88/61.23
6. Step 6: Final answer
   x = 90.90