Finding the Fourth Proportional to 12,866.80, 19,301.10 and 5,470.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,866.80 : 19,301.10 = 5,470.42 : x
2. Step 2: Convert to fraction form
   12,866.80/19,301.10 = 5,470.42/x
3. Step 3: Cross multiply
   12,866.80x = 19,301.10 × 5,470.42
4. Step 4: Simplify right side
   12,866.80x = 105,585,123.46
5. Step 5: Solve for x
   x = 105,585,123.46/12,866.80
6. Step 6: Final answer
   x = 8,206.01