Finding the Fourth Proportional to 1,917.27, 2,645.73 and 1,131.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,917.27 : 2,645.73 = 1,131.30 : x
2. Step 2: Convert to fraction form
   1,917.27/2,645.73 = 1,131.30/x
3. Step 3: Cross multiply
   1,917.27x = 2,645.73 × 1,131.30
4. Step 4: Simplify right side
   1,917.27x = 2,993,114.35
5. Step 5: Solve for x
   x = 2,993,114.35/1,917.27
6. Step 6: Final answer
   x = 1,561.13