Finding the Fourth Proportional to 1,938.61, 2,672.81 and 1,256.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,938.61 : 2,672.81 = 1,256.04 : x
2. Step 2: Convert to fraction form
   1,938.61/2,672.81 = 1,256.04/x
3. Step 3: Cross multiply
   1,938.61x = 2,672.81 × 1,256.04
4. Step 4: Simplify right side
   1,938.61x = 3,357,156.27
5. Step 5: Solve for x
   x = 3,357,156.27/1,938.61
6. Step 6: Final answer
   x = 1,731.73