Finding the Fourth Proportional to 1,562.31, 2,155.74 and 1,003.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,562.31 : 2,155.74 = 1,003.29 : x
2. Step 2: Convert to fraction form
   1,562.31/2,155.74 = 1,003.29/x
3. Step 3: Cross multiply
   1,562.31x = 2,155.74 × 1,003.29
4. Step 4: Simplify right side
   1,562.31x = 2,162,832.38
5. Step 5: Solve for x
   x = 2,162,832.38/1,562.31
6. Step 6: Final answer
   x = 1,384.38