Finding the Fourth Proportional to 10,147.58, 14,003.57 and 5,671.28

Step by Step Solution

1. Step 1: Write the proportion equation
   10,147.58 : 14,003.57 = 5,671.28 : x
2. Step 2: Convert to fraction form
   10,147.58/14,003.57 = 5,671.28/x
3. Step 3: Cross multiply
   10,147.58x = 14,003.57 × 5,671.28
4. Step 4: Simplify right side
   10,147.58x = 79,418,068.10
5. Step 5: Solve for x
   x = 79,418,068.10/10,147.58
6. Step 6: Final answer
   x = 7,826.31