Finding the Fourth Proportional to 21,426.27, 32,160.15 and 10,340.74

Step by Step Solution

1. Step 1: Write the proportion equation
   21,426.27 : 32,160.15 = 10,340.74 : x
2. Step 2: Convert to fraction form
   21,426.27/32,160.15 = 10,340.74/x
3. Step 3: Cross multiply
   21,426.27x = 32,160.15 × 10,340.74
4. Step 4: Simplify right side
   21,426.27x = 332,559,749.51
5. Step 5: Solve for x
   x = 332,559,749.51/21,426.27
6. Step 6: Final answer
   x = 15,521.12