Finding the Fourth Proportional to 22,677.72, 34,038.12 and 13,929.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,677.72 : 34,038.12 = 13,929.72 : x
2. Step 2: Convert to fraction form
   22,677.72/34,038.12 = 13,929.72/x
3. Step 3: Cross multiply
   22,677.72x = 34,038.12 × 13,929.72
4. Step 4: Simplify right side
   22,677.72x = 474,141,480.93
5. Step 5: Solve for x
   x = 474,141,480.93/22,677.72
6. Step 6: Final answer
   x = 20,907.81