Finding the Fourth Proportional to 1,776.59, 2,451.69 and 990.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,776.59 : 2,451.69 = 990.62 : x
2. Step 2: Convert to fraction form
   1,776.59/2,451.69 = 990.62/x
3. Step 3: Cross multiply
   1,776.59x = 2,451.69 × 990.62
4. Step 4: Simplify right side
   1,776.59x = 2,428,693.15
5. Step 5: Solve for x
   x = 2,428,693.15/1,776.59
6. Step 6: Final answer
   x = 1,367.05