Finding the Fourth Proportional to 2,371.86, 3,557.34 and 728.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,371.86 : 3,557.34 = 728.16 : x
2. Step 2: Convert to fraction form
   2,371.86/3,557.34 = 728.16/x
3. Step 3: Cross multiply
   2,371.86x = 3,557.34 × 728.16
4. Step 4: Simplify right side
   2,371.86x = 2,590,312.69
5. Step 5: Solve for x
   x = 2,590,312.69/2,371.86
6. Step 6: Final answer
   x = 1,092.10