Finding the Fourth Proportional to 4,128.31, 6,192.78 and 1,663.15

Step by Step Solution

1. Step 1: Write the proportion equation
   4,128.31 : 6,192.78 = 1,663.15 : x
2. Step 2: Convert to fraction form
   4,128.31/6,192.78 = 1,663.15/x
3. Step 3: Cross multiply
   4,128.31x = 6,192.78 × 1,663.15
4. Step 4: Simplify right side
   4,128.31x = 10,299,522.06
5. Step 5: Solve for x
   x = 10,299,522.06/4,128.31
6. Step 6: Final answer
   x = 2,494.85