Finding the Fourth Proportional to 1,877.44, 2,591.06 and 1,131.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,877.44 : 2,591.06 = 1,131.72 : x
2. Step 2: Convert to fraction form
   1,877.44/2,591.06 = 1,131.72/x
3. Step 3: Cross multiply
   1,877.44x = 2,591.06 × 1,131.72
4. Step 4: Simplify right side
   1,877.44x = 2,932,354.42
5. Step 5: Solve for x
   x = 2,932,354.42/1,877.44
6. Step 6: Final answer
   x = 1,561.89