Finding the Fourth Proportional to 3,388.59, 5,076.54 and 1,997.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,388.59 : 5,076.54 = 1,997.78 : x
2. Step 2: Convert to fraction form
   3,388.59/5,076.54 = 1,997.78/x
3. Step 3: Cross multiply
   3,388.59x = 5,076.54 × 1,997.78
4. Step 4: Simplify right side
   3,388.59x = 10,141,784.70
5. Step 5: Solve for x
   x = 10,141,784.70/3,388.59
6. Step 6: Final answer
   x = 2,992.92