Finding the Fourth Proportional to 1,397.02, 1,925.56 and 1,279.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.02 : 1,925.56 = 1,279.37 : x
2. Step 2: Convert to fraction form
   1,397.02/1,925.56 = 1,279.37/x
3. Step 3: Cross multiply
   1,397.02x = 1,925.56 × 1,279.37
4. Step 4: Simplify right side
   1,397.02x = 2,463,503.70
5. Step 5: Solve for x
   x = 2,463,503.70/1,397.02
6. Step 6: Final answer
   x = 1,763.40