Finding the Fourth Proportional to 1,443.24, 2,160.54 and 929.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.24 : 2,160.54 = 929.16 : x
2. Step 2: Convert to fraction form
   1,443.24/2,160.54 = 929.16/x
3. Step 3: Cross multiply
   1,443.24x = 2,160.54 × 929.16
4. Step 4: Simplify right side
   1,443.24x = 2,007,487.35
5. Step 5: Solve for x
   x = 2,007,487.35/1,443.24
6. Step 6: Final answer
   x = 1,390.96