Finding the Fourth Proportional to 1,780.55, 2,457.23 and 994.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,780.55 : 2,457.23 = 994.44 : x
2. Step 2: Convert to fraction form
   1,780.55/2,457.23 = 994.44/x
3. Step 3: Cross multiply
   1,780.55x = 2,457.23 × 994.44
4. Step 4: Simplify right side
   1,780.55x = 2,443,562.83
5. Step 5: Solve for x
   x = 2,443,562.83/1,780.55
6. Step 6: Final answer
   x = 1,372.37