Finding the Fourth Proportional to 1,899.47, 2,849.31 and 1,078.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,899.47 : 2,849.31 = 1,078.34 : x
2. Step 2: Convert to fraction form
   1,899.47/2,849.31 = 1,078.34/x
3. Step 3: Cross multiply
   1,899.47x = 2,849.31 × 1,078.34
4. Step 4: Simplify right side
   1,899.47x = 3,072,510.70
5. Step 5: Solve for x
   x = 3,072,510.70/1,899.47
6. Step 6: Final answer
   x = 1,617.56