Finding the Fourth Proportional to 1,895.86, 2,616.20 and 1,398.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,895.86 : 2,616.20 = 1,398.31 : x
2. Step 2: Convert to fraction form
   1,895.86/2,616.20 = 1,398.31/x
3. Step 3: Cross multiply
   1,895.86x = 2,616.20 × 1,398.31
4. Step 4: Simplify right side
   1,895.86x = 3,658,265.05
5. Step 5: Solve for x
   x = 3,658,265.05/1,895.86
6. Step 6: Final answer
   x = 1,929.61