Finding the Fourth Proportional to 12,807.24, 19,219.50 and 4,487.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,807.24 : 19,219.50 = 4,487.31 : x
2. Step 2: Convert to fraction form
   12,807.24/19,219.50 = 4,487.31/x
3. Step 3: Cross multiply
   12,807.24x = 19,219.50 × 4,487.31
4. Step 4: Simplify right side
   12,807.24x = 86,243,854.55
5. Step 5: Solve for x
   x = 86,243,854.55/12,807.24
6. Step 6: Final answer
   x = 6,733.99