Finding the Fourth Proportional to 2,071.78, 2,857.89 and 1,363.66

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.78 : 2,857.89 = 1,363.66 : x
2. Step 2: Convert to fraction form
   2,071.78/2,857.89 = 1,363.66/x
3. Step 3: Cross multiply
   2,071.78x = 2,857.89 × 1,363.66
4. Step 4: Simplify right side
   2,071.78x = 3,897,190.28
5. Step 5: Solve for x
   x = 3,897,190.28/2,071.78
6. Step 6: Final answer
   x = 1,881.08