Finding the Fourth Proportional to 10,501.17, 15,780.68 and 5,574.49

Step by Step Solution

1. Step 1: Write the proportion equation
   10,501.17 : 15,780.68 = 5,574.49 : x
2. Step 2: Convert to fraction form
   10,501.17/15,780.68 = 5,574.49/x
3. Step 3: Cross multiply
   10,501.17x = 15,780.68 × 5,574.49
4. Step 4: Simplify right side
   10,501.17x = 87,969,255.61
5. Step 5: Solve for x
   x = 87,969,255.61/10,501.17
6. Step 6: Final answer
   x = 8,377.09