Finding the Fourth Proportional to 10,443.02, 15,665.20 and 3,421.16

Step by Step Solution

1. Step 1: Write the proportion equation
   10,443.02 : 15,665.20 = 3,421.16 : x
2. Step 2: Convert to fraction form
   10,443.02/15,665.20 = 3,421.16/x
3. Step 3: Cross multiply
   10,443.02x = 15,665.20 × 3,421.16
4. Step 4: Simplify right side
   10,443.02x = 53,593,155.63
5. Step 5: Solve for x
   x = 53,593,155.63/10,443.02
6. Step 6: Final answer
   x = 5,131.96