Finding the Fourth Proportional to 1,892.16, 2,839.05 and 1,278.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,892.16 : 2,839.05 = 1,278.18 : x
2. Step 2: Convert to fraction form
   1,892.16/2,839.05 = 1,278.18/x
3. Step 3: Cross multiply
   1,892.16x = 2,839.05 × 1,278.18
4. Step 4: Simplify right side
   1,892.16x = 3,628,816.93
5. Step 5: Solve for x
   x = 3,628,816.93/1,892.16
6. Step 6: Final answer
   x = 1,917.82