Finding the Fourth Proportional to 1,402.72, 1,934.40 and 1,255.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.72 : 1,934.40 = 1,255.84 : x
2. Step 2: Convert to fraction form
   1,402.72/1,934.40 = 1,255.84/x
3. Step 3: Cross multiply
   1,402.72x = 1,934.40 × 1,255.84
4. Step 4: Simplify right side
   1,402.72x = 2,429,296.90
5. Step 5: Solve for x
   x = 2,429,296.90/1,402.72
6. Step 6: Final answer
   x = 1,731.85