Finding the Fourth Proportional to 10,123.72, 13,969.50 and 5,647.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,123.72 : 13,969.50 = 5,647.72 : x
2. Step 2: Convert to fraction form
   10,123.72/13,969.50 = 5,647.72/x
3. Step 3: Cross multiply
   10,123.72x = 13,969.50 × 5,647.72
4. Step 4: Simplify right side
   10,123.72x = 78,895,824.54
5. Step 5: Solve for x
   x = 78,895,824.54/10,123.72
6. Step 6: Final answer
   x = 7,793.17