Finding the Fourth Proportional to 22,398.76, 30,910.26 and 13,897.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,398.76 : 30,910.26 = 13,897.72 : x
2. Step 2: Convert to fraction form
   22,398.76/30,910.26 = 13,897.72/x
3. Step 3: Cross multiply
   22,398.76x = 30,910.26 × 13,897.72
4. Step 4: Simplify right side
   22,398.76x = 429,582,138.61
5. Step 5: Solve for x
   x = 429,582,138.61/22,398.76
6. Step 6: Final answer
   x = 19,178.84