Finding the Fourth Proportional to 10,470.07, 15,710.49 and 5,789.21

Step by Step Solution

1. Step 1: Write the proportion equation
   10,470.07 : 15,710.49 = 5,789.21 : x
2. Step 2: Convert to fraction form
   10,470.07/15,710.49 = 5,789.21/x
3. Step 3: Cross multiply
   10,470.07x = 15,710.49 × 5,789.21
4. Step 4: Simplify right side
   10,470.07x = 90,951,325.81
5. Step 5: Solve for x
   x = 90,951,325.81/10,470.07
6. Step 6: Final answer
   x = 8,686.79