Finding the Fourth Proportional to 2,446.42, 3,666.15 and 1,212.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,446.42 : 3,666.15 = 1,212.61 : x
2. Step 2: Convert to fraction form
   2,446.42/3,666.15 = 1,212.61/x
3. Step 3: Cross multiply
   2,446.42x = 3,666.15 × 1,212.61
4. Step 4: Simplify right side
   2,446.42x = 4,445,610.15
5. Step 5: Solve for x
   x = 4,445,610.15/2,446.42
6. Step 6: Final answer
   x = 1,817.19