Finding the Fourth Proportional to 10,147.80, 14,005.30 and 5,672.49

Step by Step Solution

1. Step 1: Write the proportion equation
   10,147.80 : 14,005.30 = 5,672.49 : x
2. Step 2: Convert to fraction form
   10,147.80/14,005.30 = 5,672.49/x
3. Step 3: Cross multiply
   10,147.80x = 14,005.30 × 5,672.49
4. Step 4: Simplify right side
   10,147.80x = 79,444,924.20
5. Step 5: Solve for x
   x = 79,444,924.20/10,147.80
6. Step 6: Final answer
   x = 7,828.78