Finding the Fourth Proportional to 1,341.16, 1,859.15 and 1,289.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,341.16 : 1,859.15 = 1,289.22 : x
2. Step 2: Convert to fraction form
   1,341.16/1,859.15 = 1,289.22/x
3. Step 3: Cross multiply
   1,341.16x = 1,859.15 × 1,289.22
4. Step 4: Simplify right side
   1,341.16x = 2,396,849.61
5. Step 5: Solve for x
   x = 2,396,849.61/1,341.16
6. Step 6: Final answer
   x = 1,787.15