Finding the Fourth Proportional to 2,169.72, 2,994.16 and 1,225.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,169.72 : 2,994.16 = 1,225.56 : x
2. Step 2: Convert to fraction form
   2,169.72/2,994.16 = 1,225.56/x
3. Step 3: Cross multiply
   2,169.72x = 2,994.16 × 1,225.56
4. Step 4: Simplify right side
   2,169.72x = 3,669,522.73
5. Step 5: Solve for x
   x = 3,669,522.73/2,169.72
6. Step 6: Final answer
   x = 1,691.24