Finding the Fourth Proportional to 1,906.38, 2,856.63 and 933.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,906.38 : 2,856.63 = 933.15 : x
2. Step 2: Convert to fraction form
   1,906.38/2,856.63 = 933.15/x
3. Step 3: Cross multiply
   1,906.38x = 2,856.63 × 933.15
4. Step 4: Simplify right side
   1,906.38x = 2,665,664.28
5. Step 5: Solve for x
   x = 2,665,664.28/1,906.38
6. Step 6: Final answer
   x = 1,398.29