Finding the Fourth Proportional to 9,042.58, 12,478.98 and 5,064.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,042.58 : 12,478.98 = 5,064.54 : x
2. Step 2: Convert to fraction form
   9,042.58/12,478.98 = 5,064.54/x
3. Step 3: Cross multiply
   9,042.58x = 12,478.98 × 5,064.54
4. Step 4: Simplify right side
   9,042.58x = 63,200,293.37
5. Step 5: Solve for x
   x = 63,200,293.37/9,042.58
6. Step 6: Final answer
   x = 6,989.19