Finding the Fourth Proportional to 1,328.72, 1,992.72 and 597.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,328.72 : 1,992.72 = 597.86 : x
2. Step 2: Convert to fraction form
   1,328.72/1,992.72 = 597.86/x
3. Step 3: Cross multiply
   1,328.72x = 1,992.72 × 597.86
4. Step 4: Simplify right side
   1,328.72x = 1,191,367.58
5. Step 5: Solve for x
   x = 1,191,367.58/1,328.72
6. Step 6: Final answer
   x = 896.63