Finding the Fourth Proportional to 1,574.01, 2,172.15 and 984.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,574.01 : 2,172.15 = 984.96 : x
2. Step 2: Convert to fraction form
   1,574.01/2,172.15 = 984.96/x
3. Step 3: Cross multiply
   1,574.01x = 2,172.15 × 984.96
4. Step 4: Simplify right side
   1,574.01x = 2,139,480.86
5. Step 5: Solve for x
   x = 2,139,480.86/1,574.01
6. Step 6: Final answer
   x = 1,359.25