Finding the Fourth Proportional to 1,743.35, 2,402.73 and 1,388.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,743.35 : 2,402.73 = 1,388.57 : x
2. Step 2: Convert to fraction form
   1,743.35/2,402.73 = 1,388.57/x
3. Step 3: Cross multiply
   1,743.35x = 2,402.73 × 1,388.57
4. Step 4: Simplify right side
   1,743.35x = 3,336,346.78
5. Step 5: Solve for x
   x = 3,336,346.78/1,743.35
6. Step 6: Final answer
   x = 1,913.76