Finding the Fourth Proportional to 1,760.72, 2,640.42 and 981.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,760.72 : 2,640.42 = 981.92 : x
2. Step 2: Convert to fraction form
   1,760.72/2,640.42 = 981.92/x
3. Step 3: Cross multiply
   1,760.72x = 2,640.42 × 981.92
4. Step 4: Simplify right side
   1,760.72x = 2,592,681.21
5. Step 5: Solve for x
   x = 2,592,681.21/1,760.72
6. Step 6: Final answer
   x = 1,472.51