Finding the Fourth Proportional to 12,567.56, 18,821.40 and 7,007.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,567.56 : 18,821.40 = 7,007.12 : x
2. Step 2: Convert to fraction form
   12,567.56/18,821.40 = 7,007.12/x
3. Step 3: Cross multiply
   12,567.56x = 18,821.40 × 7,007.12
4. Step 4: Simplify right side
   12,567.56x = 131,883,808.37
5. Step 5: Solve for x
   x = 131,883,808.37/12,567.56
6. Step 6: Final answer
   x = 10,493.99