Finding the Fourth Proportional to 1,428.57, 1,972.77 and 1,350.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,428.57 : 1,972.77 = 1,350.92 : x
2. Step 2: Convert to fraction form
   1,428.57/1,972.77 = 1,350.92/x
3. Step 3: Cross multiply
   1,428.57x = 1,972.77 × 1,350.92
4. Step 4: Simplify right side
   1,428.57x = 2,665,054.45
5. Step 5: Solve for x
   x = 2,665,054.45/1,428.57
6. Step 6: Final answer
   x = 1,865.55