Finding the Fourth Proportional to 64,915.25, 89,581.43 and 36,618.71

Step by Step Solution

1. Step 1: Write the proportion equation
   64,915.25 : 89,581.43 = 36,618.71 : x
2. Step 2: Convert to fraction form
   64,915.25/89,581.43 = 36,618.71/x
3. Step 3: Cross multiply
   64,915.25x = 89,581.43 × 36,618.71
4. Step 4: Simplify right side
   64,915.25x = 3,280,356,223.46
5. Step 5: Solve for x
   x = 3,280,356,223.46/64,915.25
6. Step 6: Final answer
   x = 50,532.91