Finding the Fourth Proportional to 12,213.32, 18,320.90 and 5,192.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,213.32 : 18,320.90 = 5,192.56 : x
2. Step 2: Convert to fraction form
   12,213.32/18,320.90 = 5,192.56/x
3. Step 3: Cross multiply
   12,213.32x = 18,320.90 × 5,192.56
4. Step 4: Simplify right side
   12,213.32x = 95,132,372.50
5. Step 5: Solve for x
   x = 95,132,372.50/12,213.32
6. Step 6: Final answer
   x = 7,789.23