Finding the Fourth Proportional to 2,897.72, 4,345.92 and 817.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,897.72 : 4,345.92 = 817.93 : x
2. Step 2: Convert to fraction form
   2,897.72/4,345.92 = 817.93/x
3. Step 3: Cross multiply
   2,897.72x = 4,345.92 × 817.93
4. Step 4: Simplify right side
   2,897.72x = 3,554,663.78
5. Step 5: Solve for x
   x = 3,554,663.78/2,897.72
6. Step 6: Final answer
   x = 1,226.71