Finding the Fourth Proportional to 7,148.72, 9,863.96 and 4,315.34

Step by Step Solution

1. Step 1: Write the proportion equation
   7,148.72 : 9,863.96 = 4,315.34 : x
2. Step 2: Convert to fraction form
   7,148.72/9,863.96 = 4,315.34/x
3. Step 3: Cross multiply
   7,148.72x = 9,863.96 × 4,315.34
4. Step 4: Simplify right side
   7,148.72x = 42,566,341.15
5. Step 5: Solve for x
   x = 42,566,341.15/7,148.72
6. Step 6: Final answer
   x = 5,954.40