Finding the Fourth Proportional to 12,228.50, 18,342.78 and 4,437.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,228.50 : 18,342.78 = 4,437.32 : x
2. Step 2: Convert to fraction form
   12,228.50/18,342.78 = 4,437.32/x
3. Step 3: Cross multiply
   12,228.50x = 18,342.78 × 4,437.32
4. Step 4: Simplify right side
   12,228.50x = 81,392,784.55
5. Step 5: Solve for x
   x = 81,392,784.55/12,228.50
6. Step 6: Final answer
   x = 6,655.99