Finding the Fourth Proportional to 1,997.21, 2,994.52 and 826.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,997.21 : 2,994.52 = 826.90 : x
2. Step 2: Convert to fraction form
   1,997.21/2,994.52 = 826.90/x
3. Step 3: Cross multiply
   1,997.21x = 2,994.52 × 826.90
4. Step 4: Simplify right side
   1,997.21x = 2,476,168.59
5. Step 5: Solve for x
   x = 2,476,168.59/1,997.21
6. Step 6: Final answer
   x = 1,239.81