Finding the Fourth Proportional to 1,780.54, 2,457.25 and 994.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,780.54 : 2,457.25 = 994.58 : x
2. Step 2: Convert to fraction form
   1,780.54/2,457.25 = 994.58/x
3. Step 3: Cross multiply
   1,780.54x = 2,457.25 × 994.58
4. Step 4: Simplify right side
   1,780.54x = 2,443,931.71
5. Step 5: Solve for x
   x = 2,443,931.71/1,780.54
6. Step 6: Final answer
   x = 1,372.58