Finding the Fourth Proportional to 89,452.42, 123,552.60 and 65,215

Step by Step Solution

1. Step 1: Write the proportion equation
   89,452.42 : 123,552.60 = 65,215 : x
2. Step 2: Convert to fraction form
   89,452.42/123,552.60 = 65,215/x
3. Step 3: Cross multiply
   89,452.42x = 123,552.60 × 65,215
4. Step 4: Simplify right side
   89,452.42x = 8,057,482,809
5. Step 5: Solve for x
   x = 8,057,482,809/89,452.42
6. Step 6: Final answer
   x = 90,075.63