Finding the Fourth Proportional to 1,992.78, 2,990.16 and 1,411.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,992.78 : 2,990.16 = 1,411.53 : x
2. Step 2: Convert to fraction form
   1,992.78/2,990.16 = 1,411.53/x
3. Step 3: Cross multiply
   1,992.78x = 2,990.16 × 1,411.53
4. Step 4: Simplify right side
   1,992.78x = 4,220,700.54
5. Step 5: Solve for x
   x = 4,220,700.54/1,992.78
6. Step 6: Final answer
   x = 2,118.00