Finding the Fourth Proportional to 1,776.82, 2,452.06 and 990.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,776.82 : 2,452.06 = 990.86 : x
2. Step 2: Convert to fraction form
   1,776.82/2,452.06 = 990.86/x
3. Step 3: Cross multiply
   1,776.82x = 2,452.06 × 990.86
4. Step 4: Simplify right side
   1,776.82x = 2,429,648.17
5. Step 5: Solve for x
   x = 2,429,648.17/1,776.82
6. Step 6: Final answer
   x = 1,367.41