Finding the Fourth Proportional to 12,782.58, 19,172.34 and 3,423.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,782.58 : 19,172.34 = 3,423.30 : x
2. Step 2: Convert to fraction form
   12,782.58/19,172.34 = 3,423.30/x
3. Step 3: Cross multiply
   12,782.58x = 19,172.34 × 3,423.30
4. Step 4: Simplify right side
   12,782.58x = 65,632,671.52
5. Step 5: Solve for x
   x = 65,632,671.52/12,782.58
6. Step 6: Final answer
   x = 5,134.54