Finding the Fourth Proportional to 9,326.99, 12,870.85 and 5,078.06

Step by Step Solution

1. Step 1: Write the proportion equation
   9,326.99 : 12,870.85 = 5,078.06 : x
2. Step 2: Convert to fraction form
   9,326.99/12,870.85 = 5,078.06/x
3. Step 3: Cross multiply
   9,326.99x = 12,870.85 × 5,078.06
4. Step 4: Simplify right side
   9,326.99x = 65,358,948.55
5. Step 5: Solve for x
   x = 65,358,948.55/9,326.99
6. Step 6: Final answer
   x = 7,007.51