Finding the Fourth Proportional to 8,637.59, 12,957.31 and 2,397.63

Step by Step Solution

1. Step 1: Write the proportion equation
   8,637.59 : 12,957.31 = 2,397.63 : x
2. Step 2: Convert to fraction form
   8,637.59/12,957.31 = 2,397.63/x
3. Step 3: Cross multiply
   8,637.59x = 12,957.31 × 2,397.63
4. Step 4: Simplify right side
   8,637.59x = 31,066,819.95
5. Step 5: Solve for x
   x = 31,066,819.95/8,637.59
6. Step 6: Final answer
   x = 3,596.70