Finding the Fourth Proportional to 12,707.98, 19,064.51 and 4,388.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,707.98 : 19,064.51 = 4,388.30 : x
2. Step 2: Convert to fraction form
   12,707.98/19,064.51 = 4,388.30/x
3. Step 3: Cross multiply
   12,707.98x = 19,064.51 × 4,388.30
4. Step 4: Simplify right side
   12,707.98x = 83,660,784.60
5. Step 5: Solve for x
   x = 83,660,784.60/12,707.98
6. Step 6: Final answer
   x = 6,583.33