Finding the Fourth Proportional to 9,218.56, 12,721.50 and 5,026.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,218.56 : 12,721.50 = 5,026.72 : x
2. Step 2: Convert to fraction form
   9,218.56/12,721.50 = 5,026.72/x
3. Step 3: Cross multiply
   9,218.56x = 12,721.50 × 5,026.72
4. Step 4: Simplify right side
   9,218.56x = 63,947,418.48
5. Step 5: Solve for x
   x = 63,947,418.48/9,218.56
6. Step 6: Final answer
   x = 6,936.81