Finding the Fourth Proportional to 3,223.86, 4,836.27 and 915.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,223.86 : 4,836.27 = 915.30 : x
2. Step 2: Convert to fraction form
   3,223.86/4,836.27 = 915.30/x
3. Step 3: Cross multiply
   3,223.86x = 4,836.27 × 915.30
4. Step 4: Simplify right side
   3,223.86x = 4,426,637.93
5. Step 5: Solve for x
   x = 4,426,637.93/3,223.86
6. Step 6: Final answer
   x = 1,373.09