Finding the Fourth Proportional to 1,510.72, 2,082.88 and 985.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,510.72 : 2,082.88 = 985.92 : x
2. Step 2: Convert to fraction form
   1,510.72/2,082.88 = 985.92/x
3. Step 3: Cross multiply
   1,510.72x = 2,082.88 × 985.92
4. Step 4: Simplify right side
   1,510.72x = 2,053,553.05
5. Step 5: Solve for x
   x = 2,053,553.05/1,510.72
6. Step 6: Final answer
   x = 1,359.32