Finding the Fourth Proportional to 13,261.30, 19,894.37 and 5,470.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,261.30 : 19,894.37 = 5,470.72 : x
2. Step 2: Convert to fraction form
   13,261.30/19,894.37 = 5,470.72/x
3. Step 3: Cross multiply
   13,261.30x = 19,894.37 × 5,470.72
4. Step 4: Simplify right side
   13,261.30x = 108,836,527.85
5. Step 5: Solve for x
   x = 108,836,527.85/13,261.30
6. Step 6: Final answer
   x = 8,207.08