Finding the Fourth Proportional to 2,663.89, 3,997.01 and 1,429.85

Step by Step Solution

1. Step 1: Write the proportion equation
   2,663.89 : 3,997.01 = 1,429.85 : x
2. Step 2: Convert to fraction form
   2,663.89/3,997.01 = 1,429.85/x
3. Step 3: Cross multiply
   2,663.89x = 3,997.01 × 1,429.85
4. Step 4: Simplify right side
   2,663.89x = 5,715,138.32
5. Step 5: Solve for x
   x = 5,715,138.32/2,663.89
6. Step 6: Final answer
   x = 2,145.41