Finding the Fourth Proportional to 2,519.47, 3,774.34 and 1,221.85

Step by Step Solution

1. Step 1: Write the proportion equation
   2,519.47 : 3,774.34 = 1,221.85 : x
2. Step 2: Convert to fraction form
   2,519.47/3,774.34 = 1,221.85/x
3. Step 3: Cross multiply
   2,519.47x = 3,774.34 × 1,221.85
4. Step 4: Simplify right side
   2,519.47x = 4,611,677.33
5. Step 5: Solve for x
   x = 4,611,677.33/2,519.47
6. Step 6: Final answer
   x = 1,830.42