Finding the Fourth Proportional to 3,931.80, 5,892.90 and 1,738.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,931.80 : 5,892.90 = 1,738.20 : x
2. Step 2: Convert to fraction form
   3,931.80/5,892.90 = 1,738.20/x
3. Step 3: Cross multiply
   3,931.80x = 5,892.90 × 1,738.20
4. Step 4: Simplify right side
   3,931.80x = 10,243,038.78
5. Step 5: Solve for x
   x = 10,243,038.78/3,931.80
6. Step 6: Final answer
   x = 2,605.18