Finding the Fourth Proportional to 10,427.20, 14,389.56 and 5,647.19

Step by Step Solution

1. Step 1: Write the proportion equation
   10,427.20 : 14,389.56 = 5,647.19 : x
2. Step 2: Convert to fraction form
   10,427.20/14,389.56 = 5,647.19/x
3. Step 3: Cross multiply
   10,427.20x = 14,389.56 × 5,647.19
4. Step 4: Simplify right side
   10,427.20x = 81,260,507.39
5. Step 5: Solve for x
   x = 81,260,507.39/10,427.20
6. Step 6: Final answer
   x = 7,793.13