Finding the Fourth Proportional to 12,357.98, 18,533.15 and 4,459.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,357.98 : 18,533.15 = 4,459.47 : x
2. Step 2: Convert to fraction form
   12,357.98/18,533.15 = 4,459.47/x
3. Step 3: Cross multiply
   12,357.98x = 18,533.15 × 4,459.47
4. Step 4: Simplify right side
   12,357.98x = 82,648,004.13
5. Step 5: Solve for x
   x = 82,648,004.13/12,357.98
6. Step 6: Final answer
   x = 6,687.82