Finding the Fourth Proportional to 3,923.17, 5,407.47 and 3,819.29

Step by Step Solution

1. Step 1: Write the proportion equation
   3,923.17 : 5,407.47 = 3,819.29 : x
2. Step 2: Convert to fraction form
   3,923.17/5,407.47 = 3,819.29/x
3. Step 3: Cross multiply
   3,923.17x = 5,407.47 × 3,819.29
4. Step 4: Simplify right side
   3,923.17x = 20,652,689.34
5. Step 5: Solve for x
   x = 20,652,689.34/3,923.17
6. Step 6: Final answer
   x = 5,264.28