Finding the Fourth Proportional to 12,859.79, 19,287.72 and 3,500.37

Step by Step Solution

1. Step 1: Write the proportion equation
   12,859.79 : 19,287.72 = 3,500.37 : x
2. Step 2: Convert to fraction form
   12,859.79/19,287.72 = 3,500.37/x
3. Step 3: Cross multiply
   12,859.79x = 19,287.72 × 3,500.37
4. Step 4: Simplify right side
   12,859.79x = 67,514,156.46
5. Step 5: Solve for x
   x = 67,514,156.46/12,859.79
6. Step 6: Final answer
   x = 5,250.02