Finding the Fourth Proportional to 10,870.91, 16,306.47 and 3,475.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,870.91 : 16,306.47 = 3,475.20 : x
2. Step 2: Convert to fraction form
   10,870.91/16,306.47 = 3,475.20/x
3. Step 3: Cross multiply
   10,870.91x = 16,306.47 × 3,475.20
4. Step 4: Simplify right side
   10,870.91x = 56,668,244.54
5. Step 5: Solve for x
   x = 56,668,244.54/10,870.91
6. Step 6: Final answer
   x = 5,212.84