Finding the Fourth Proportional to 1,898.71, 2,846.12 and 728.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,898.71 : 2,846.12 = 728.39 : x
2. Step 2: Convert to fraction form
   1,898.71/2,846.12 = 728.39/x
3. Step 3: Cross multiply
   1,898.71x = 2,846.12 × 728.39
4. Step 4: Simplify right side
   1,898.71x = 2,073,088.82
5. Step 5: Solve for x
   x = 2,073,088.82/1,898.71
6. Step 6: Final answer
   x = 1,091.84