Finding the Fourth Proportional to 13,066.72, 19,599.37 and 12,296.21

Step by Step Solution

1. Step 1: Write the proportion equation
   13,066.72 : 19,599.37 = 12,296.21 : x
2. Step 2: Convert to fraction form
   13,066.72/19,599.37 = 12,296.21/x
3. Step 3: Cross multiply
   13,066.72x = 19,599.37 × 12,296.21
4. Step 4: Simplify right side
   13,066.72x = 240,997,840.65
5. Step 5: Solve for x
   x = 240,997,840.65/13,066.72
6. Step 6: Final answer
   x = 18,443.64