Finding the Fourth Proportional to 12,766.58, 19,148.34 and 3,407.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,766.58 : 19,148.34 = 3,407.30 : x
2. Step 2: Convert to fraction form
   12,766.58/19,148.34 = 3,407.30/x
3. Step 3: Cross multiply
   12,766.58x = 19,148.34 × 3,407.30
4. Step 4: Simplify right side
   12,766.58x = 65,244,138.88
5. Step 5: Solve for x
   x = 65,244,138.88/12,766.58
6. Step 6: Final answer
   x = 5,110.54