Finding the Fourth Proportional to 22,663.30, 31,271.88 and 12,591.58

Step by Step Solution

1. Step 1: Write the proportion equation
   22,663.30 : 31,271.88 = 12,591.58 : x
2. Step 2: Convert to fraction form
   22,663.30/31,271.88 = 12,591.58/x
3. Step 3: Cross multiply
   22,663.30x = 31,271.88 × 12,591.58
4. Step 4: Simplify right side
   22,663.30x = 393,762,378.77
5. Step 5: Solve for x
   x = 393,762,378.77/22,663.30
6. Step 6: Final answer
   x = 17,374.45