Finding the Fourth Proportional to 22,682.28, 31,300.74 and 13,257

Step by Step Solution

1. Step 1: Write the proportion equation
   22,682.28 : 31,300.74 = 13,257 : x
2. Step 2: Convert to fraction form
   22,682.28/31,300.74 = 13,257/x
3. Step 3: Cross multiply
   22,682.28x = 31,300.74 × 13,257
4. Step 4: Simplify right side
   22,682.28x = 414,953,910.18
5. Step 5: Solve for x
   x = 414,953,910.18/22,682.28
6. Step 6: Final answer
   x = 18,294.19