Finding the Fourth Proportional to 1,807.68, 2,707.20 and 984.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,807.68 : 2,707.20 = 984.72 : x
2. Step 2: Convert to fraction form
   1,807.68/2,707.20 = 984.72/x
3. Step 3: Cross multiply
   1,807.68x = 2,707.20 × 984.72
4. Step 4: Simplify right side
   1,807.68x = 2,665,833.98
5. Step 5: Solve for x
   x = 2,665,833.98/1,807.68
6. Step 6: Final answer
   x = 1,474.73