Finding the Fourth Proportional to 5,470.91, 8,154.39 and 5,159.55

Step by Step Solution

1. Step 1: Write the proportion equation
   5,470.91 : 8,154.39 = 5,159.55 : x
2. Step 2: Convert to fraction form
   5,470.91/8,154.39 = 5,159.55/x
3. Step 3: Cross multiply
   5,470.91x = 8,154.39 × 5,159.55
4. Step 4: Simplify right side
   5,470.91x = 42,072,957.13
5. Step 5: Solve for x
   x = 42,072,957.13/5,470.91
6. Step 6: Final answer
   x = 7,690.31