Finding the Fourth Proportional to 1,718.72, 2,373.80 and 1,131.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,718.72 : 2,373.80 = 1,131.87 : x
2. Step 2: Convert to fraction form
   1,718.72/2,373.80 = 1,131.87/x
3. Step 3: Cross multiply
   1,718.72x = 2,373.80 × 1,131.87
4. Step 4: Simplify right side
   1,718.72x = 2,686,827.35
5. Step 5: Solve for x
   x = 2,686,827.35/1,718.72
6. Step 6: Final answer
   x = 1,563.28