Finding the Fourth Proportional to 1,892.45, 2,839.89 and 1,071.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,892.45 : 2,839.89 = 1,071.31 : x
2. Step 2: Convert to fraction form
   1,892.45/2,839.89 = 1,071.31/x
3. Step 3: Cross multiply
   1,892.45x = 2,839.89 × 1,071.31
4. Step 4: Simplify right side
   1,892.45x = 3,042,402.56
5. Step 5: Solve for x
   x = 3,042,402.56/1,892.45
6. Step 6: Final answer
   x = 1,607.65