Finding the Fourth Proportional to 2,428.38, 3,350.70 and 1,380.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,428.38 : 3,350.70 = 1,380.42 : x
2. Step 2: Convert to fraction form
   2,428.38/3,350.70 = 1,380.42/x
3. Step 3: Cross multiply
   2,428.38x = 3,350.70 × 1,380.42
4. Step 4: Simplify right side
   2,428.38x = 4,625,373.29
5. Step 5: Solve for x
   x = 4,625,373.29/2,428.38
6. Step 6: Final answer
   x = 1,904.72