Finding the Fourth Proportional to 1,404.12, 1,938.59 and 1,256.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.12 : 1,938.59 = 1,256.50 : x
2. Step 2: Convert to fraction form
   1,404.12/1,938.59 = 1,256.50/x
3. Step 3: Cross multiply
   1,404.12x = 1,938.59 × 1,256.50
4. Step 4: Simplify right side
   1,404.12x = 2,435,838.34
5. Step 5: Solve for x
   x = 2,435,838.34/1,404.12
6. Step 6: Final answer
   x = 1,734.78