Finding the Fourth Proportional to 1,780.58, 2,457.18 and 994.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,780.58 : 2,457.18 = 994.62 : x
2. Step 2: Convert to fraction form
   1,780.58/2,457.18 = 994.62/x
3. Step 3: Cross multiply
   1,780.58x = 2,457.18 × 994.62
4. Step 4: Simplify right side
   1,780.58x = 2,443,960.37
5. Step 5: Solve for x
   x = 2,443,960.37/1,780.58
6. Step 6: Final answer
   x = 1,372.57