Finding the Fourth Proportional to 1,790.96, 2,471.52 and 1,005.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,790.96 : 2,471.52 = 1,005.15 : x
2. Step 2: Convert to fraction form
   1,790.96/2,471.52 = 1,005.15/x
3. Step 3: Cross multiply
   1,790.96x = 2,471.52 × 1,005.15
4. Step 4: Simplify right side
   1,790.96x = 2,484,248.33
5. Step 5: Solve for x
   x = 2,484,248.33/1,790.96
6. Step 6: Final answer
   x = 1,387.11