Finding the Fourth Proportional to 3,426, 5,139.72 and 1,374

Step by Step Solution

1. Step 1: Write the proportion equation
   3,426 : 5,139.72 = 1,374 : x
2. Step 2: Convert to fraction form
   3,426/5,139.72 = 1,374/x
3. Step 3: Cross multiply
   3,426x = 5,139.72 × 1,374
4. Step 4: Simplify right side
   3,426x = 7,061,975.28
5. Step 5: Solve for x
   x = 7,061,975.28/3,426
6. Step 6: Final answer
   x = 2,061.29