Finding the Fourth Proportional to 2,796.18, 4,193.43 and 921.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,796.18 : 4,193.43 = 921.72 : x
2. Step 2: Convert to fraction form
   2,796.18/4,193.43 = 921.72/x
3. Step 3: Cross multiply
   2,796.18x = 4,193.43 × 921.72
4. Step 4: Simplify right side
   2,796.18x = 3,865,163.69
5. Step 5: Solve for x
   x = 3,865,163.69/2,796.18
6. Step 6: Final answer
   x = 1,382.30