Finding the Fourth Proportional to 1,994.72, 2,991.94 and 762.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,994.72 : 2,991.94 = 762.24 : x
2. Step 2: Convert to fraction form
   1,994.72/2,991.94 = 762.24/x
3. Step 3: Cross multiply
   1,994.72x = 2,991.94 × 762.24
4. Step 4: Simplify right side
   1,994.72x = 2,280,576.35
5. Step 5: Solve for x
   x = 2,280,576.35/1,994.72
6. Step 6: Final answer
   x = 1,143.31