Finding the Fourth Proportional to 1,776.54, 2,451.59 and 990.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,776.54 : 2,451.59 = 990.58 : x
2. Step 2: Convert to fraction form
   1,776.54/2,451.59 = 990.58/x
3. Step 3: Cross multiply
   1,776.54x = 2,451.59 × 990.58
4. Step 4: Simplify right side
   1,776.54x = 2,428,496.02
5. Step 5: Solve for x
   x = 2,428,496.02/1,776.54
6. Step 6: Final answer
   x = 1,366.98