Finding the Fourth Proportional to 89.93, 123.99 and 65.02

Step by Step Solution

1. Step 1: Write the proportion equation
   89.93 : 123.99 = 65.02 : x
2. Step 2: Convert to fraction form
   89.93/123.99 = 65.02/x
3. Step 3: Cross multiply
   89.93x = 123.99 × 65.02
4. Step 4: Simplify right side
   89.93x = 8,061.83
5. Step 5: Solve for x
   x = 8,061.83/89.93
6. Step 6: Final answer
   x = 89.65