Finding the Fourth Proportional to 1,997.92, 2,994.99 and 1,072.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,997.92 : 2,994.99 = 1,072.09 : x
2. Step 2: Convert to fraction form
   1,997.92/2,994.99 = 1,072.09/x
3. Step 3: Cross multiply
   1,997.92x = 2,994.99 × 1,072.09
4. Step 4: Simplify right side
   1,997.92x = 3,210,898.83
5. Step 5: Solve for x
   x = 3,210,898.83/1,997.92
6. Step 6: Final answer
   x = 1,607.12