Finding the Fourth Proportional to 1,575.31, 2,173.20 and 984.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,575.31 : 2,173.20 = 984.82 : x
2. Step 2: Convert to fraction form
   1,575.31/2,173.20 = 984.82/x
3. Step 3: Cross multiply
   1,575.31x = 2,173.20 × 984.82
4. Step 4: Simplify right side
   1,575.31x = 2,140,210.82
5. Step 5: Solve for x
   x = 2,140,210.82/1,575.31
6. Step 6: Final answer
   x = 1,358.60