Finding the Fourth Proportional to 1,917.18, 2,646.41 and 1,131.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,917.18 : 2,646.41 = 1,131.89 : x
2. Step 2: Convert to fraction form
   1,917.18/2,646.41 = 1,131.89/x
3. Step 3: Cross multiply
   1,917.18x = 2,646.41 × 1,131.89
4. Step 4: Simplify right side
   1,917.18x = 2,995,426.12
5. Step 5: Solve for x
   x = 2,995,426.12/1,917.18
6. Step 6: Final answer
   x = 1,562.41