Finding the Fourth Proportional to 12,199.72, 18,300.66 and 3,434.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,199.72 : 18,300.66 = 3,434.72 : x
2. Step 2: Convert to fraction form
   12,199.72/18,300.66 = 3,434.72/x
3. Step 3: Cross multiply
   12,199.72x = 18,300.66 × 3,434.72
4. Step 4: Simplify right side
   12,199.72x = 62,857,642.92
5. Step 5: Solve for x
   x = 62,857,642.92/12,199.72
6. Step 6: Final answer
   x = 5,152.38