Finding the Fourth Proportional to 10,785.69, 16,156.66 and 5,580.63

Step by Step Solution

1. Step 1: Write the proportion equation
   10,785.69 : 16,156.66 = 5,580.63 : x
2. Step 2: Convert to fraction form
   10,785.69/16,156.66 = 5,580.63/x
3. Step 3: Cross multiply
   10,785.69x = 16,156.66 × 5,580.63
4. Step 4: Simplify right side
   10,785.69x = 90,164,341.50
5. Step 5: Solve for x
   x = 90,164,341.50/10,785.69
6. Step 6: Final answer
   x = 8,359.63