Finding the Fourth Proportional to 1,939.80, 2,676.72 and 1,153.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,939.80 : 2,676.72 = 1,153.74 : x
2. Step 2: Convert to fraction form
   1,939.80/2,676.72 = 1,153.74/x
3. Step 3: Cross multiply
   1,939.80x = 2,676.72 × 1,153.74
4. Step 4: Simplify right side
   1,939.80x = 3,088,238.93
5. Step 5: Solve for x
   x = 3,088,238.93/1,939.80
6. Step 6: Final answer
   x = 1,592.04