Finding the Fourth Proportional to 1,774.90, 2,449.56 and 989.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,774.90 : 2,449.56 = 989.02 : x
2. Step 2: Convert to fraction form
   1,774.90/2,449.56 = 989.02/x
3. Step 3: Cross multiply
   1,774.90x = 2,449.56 × 989.02
4. Step 4: Simplify right side
   1,774.90x = 2,422,663.83
5. Step 5: Solve for x
   x = 2,422,663.83/1,774.90
6. Step 6: Final answer
   x = 1,364.96