Finding the Fourth Proportional to 2,169.89, 2,994.27 and 1,225.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,169.89 : 2,994.27 = 1,225.63 : x
2. Step 2: Convert to fraction form
   2,169.89/2,994.27 = 1,225.63/x
3. Step 3: Cross multiply
   2,169.89x = 2,994.27 × 1,225.63
4. Step 4: Simplify right side
   2,169.89x = 3,669,866.29
5. Step 5: Solve for x
   x = 3,669,866.29/2,169.89
6. Step 6: Final answer
   x = 1,691.27