Finding the Fourth Proportional to 2,151.32, 3,224.29 and 917.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,151.32 : 3,224.29 = 917.29 : x
2. Step 2: Convert to fraction form
   2,151.32/3,224.29 = 917.29/x
3. Step 3: Cross multiply
   2,151.32x = 3,224.29 × 917.29
4. Step 4: Simplify right side
   2,151.32x = 2,957,596.89
5. Step 5: Solve for x
   x = 2,957,596.89/2,151.32
6. Step 6: Final answer
   x = 1,374.78