Finding the Fourth Proportional to 9,057.34, 12,499.13 and 5,078.45

Step by Step Solution

1. Step 1: Write the proportion equation
   9,057.34 : 12,499.13 = 5,078.45 : x
2. Step 2: Convert to fraction form
   9,057.34/12,499.13 = 5,078.45/x
3. Step 3: Cross multiply
   9,057.34x = 12,499.13 × 5,078.45
4. Step 4: Simplify right side
   9,057.34x = 63,476,206.75
5. Step 5: Solve for x
   x = 63,476,206.75/9,057.34
6. Step 6: Final answer
   x = 7,008.26