Finding the Fourth Proportional to 2,522.89, 3,778.86 and 1,221.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,522.89 : 3,778.86 = 1,221.63 : x
2. Step 2: Convert to fraction form
   2,522.89/3,778.86 = 1,221.63/x
3. Step 3: Cross multiply
   2,522.89x = 3,778.86 × 1,221.63
4. Step 4: Simplify right side
   2,522.89x = 4,616,346.79
5. Step 5: Solve for x
   x = 4,616,346.79/2,522.89
6. Step 6: Final answer
   x = 1,829.79