Finding the Fourth Proportional to 9,303.56, 12,839.22 and 5,112.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,303.56 : 12,839.22 = 5,112.20 : x
2. Step 2: Convert to fraction form
   9,303.56/12,839.22 = 5,112.20/x
3. Step 3: Cross multiply
   9,303.56x = 12,839.22 × 5,112.20
4. Step 4: Simplify right side
   9,303.56x = 65,636,660.48
5. Step 5: Solve for x
   x = 65,636,660.48/9,303.56
6. Step 6: Final answer
   x = 7,055.00