Finding the Fourth Proportional to 12,499.48, 18,749.55 and 5,475.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,499.48 : 18,749.55 = 5,475.88 : x
2. Step 2: Convert to fraction form
   12,499.48/18,749.55 = 5,475.88/x
3. Step 3: Cross multiply
   12,499.48x = 18,749.55 × 5,475.88
4. Step 4: Simplify right side
   12,499.48x = 102,670,192.11
5. Step 5: Solve for x
   x = 102,670,192.11/12,499.48
6. Step 6: Final answer
   x = 8,213.96