Finding the Fourth Proportional to 12,721.72, 19,076.52 and 4,713.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,721.72 : 19,076.52 = 4,713.88 : x
2. Step 2: Convert to fraction form
   12,721.72/19,076.52 = 4,713.88/x
3. Step 3: Cross multiply
   12,721.72x = 19,076.52 × 4,713.88
4. Step 4: Simplify right side
   12,721.72x = 89,924,426.10
5. Step 5: Solve for x
   x = 89,924,426.10/12,721.72
6. Step 6: Final answer
   x = 7,068.57