Finding the Fourth Proportional to 9,057.34, 12,499.48 and 5,078.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,057.34 : 12,499.48 = 5,078.54 : x
2. Step 2: Convert to fraction form
   9,057.34/12,499.48 = 5,078.54/x
3. Step 3: Cross multiply
   9,057.34x = 12,499.48 × 5,078.54
4. Step 4: Simplify right side
   9,057.34x = 63,479,109.16
5. Step 5: Solve for x
   x = 63,479,109.16/9,057.34
6. Step 6: Final answer
   x = 7,008.58