Finding the Fourth Proportional to 13,123.76, 18,117.50 and 8,897.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,123.76 : 18,117.50 = 8,897.18 : x
2. Step 2: Convert to fraction form
   13,123.76/18,117.50 = 8,897.18/x
3. Step 3: Cross multiply
   13,123.76x = 18,117.50 × 8,897.18
4. Step 4: Simplify right side
   13,123.76x = 161,194,523.58
5. Step 5: Solve for x
   x = 161,194,523.58/13,123.76
6. Step 6: Final answer
   x = 12,282.65