Finding the Fourth Proportional to 10,379.80, 15,469.02 and 10,047.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,379.80 : 15,469.02 = 10,047.72 : x
2. Step 2: Convert to fraction form
   10,379.80/15,469.02 = 10,047.72/x
3. Step 3: Cross multiply
   10,379.80x = 15,469.02 × 10,047.72
4. Step 4: Simplify right side
   10,379.80x = 155,428,381.63
5. Step 5: Solve for x
   x = 155,428,381.63/10,379.80
6. Step 6: Final answer
   x = 14,974.12