Finding the Fourth Proportional to 1,897.86, 2,846.94 and 728.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,897.86 : 2,846.94 = 728.43 : x
2. Step 2: Convert to fraction form
   1,897.86/2,846.94 = 728.43/x
3. Step 3: Cross multiply
   1,897.86x = 2,846.94 × 728.43
4. Step 4: Simplify right side
   1,897.86x = 2,073,796.50
5. Step 5: Solve for x
   x = 2,073,796.50/1,897.86
6. Step 6: Final answer
   x = 1,092.70