Finding the Fourth Proportional to 10,496.79, 15,737.69 and 4,947.21

Step by Step Solution

1. Step 1: Write the proportion equation
   10,496.79 : 15,737.69 = 4,947.21 : x
2. Step 2: Convert to fraction form
   10,496.79/15,737.69 = 4,947.21/x
3. Step 3: Cross multiply
   10,496.79x = 15,737.69 × 4,947.21
4. Step 4: Simplify right side
   10,496.79x = 77,857,669.71
5. Step 5: Solve for x
   x = 77,857,669.71/10,496.79
6. Step 6: Final answer
   x = 7,417.28