Finding the Fourth Proportional to 10,426.47, 15,640.18 and 3,406.92

Step by Step Solution

1. Step 1: Write the proportion equation
   10,426.47 : 15,640.18 = 3,406.92 : x
2. Step 2: Convert to fraction form
   10,426.47/15,640.18 = 3,406.92/x
3. Step 3: Cross multiply
   10,426.47x = 15,640.18 × 3,406.92
4. Step 4: Simplify right side
   10,426.47x = 53,284,746.81
5. Step 5: Solve for x
   x = 53,284,746.81/10,426.47
6. Step 6: Final answer
   x = 5,110.52