Finding the Fourth Proportional to 12,981.72, 19,470.48 and 4,661.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,981.72 : 19,470.48 = 4,661.52 : x
2. Step 2: Convert to fraction form
   12,981.72/19,470.48 = 4,661.52/x
3. Step 3: Cross multiply
   12,981.72x = 19,470.48 × 4,661.52
4. Step 4: Simplify right side
   12,981.72x = 90,762,031.93
5. Step 5: Solve for x
   x = 90,762,031.93/12,981.72
6. Step 6: Final answer
   x = 6,991.53