Finding the Fourth Proportional to 12,688.89, 19,029.15 and 4,368.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,688.89 : 19,029.15 = 4,368.71 : x
2. Step 2: Convert to fraction form
   12,688.89/19,029.15 = 4,368.71/x
3. Step 3: Cross multiply
   12,688.89x = 19,029.15 × 4,368.71
4. Step 4: Simplify right side
   12,688.89x = 83,132,742.75
5. Step 5: Solve for x
   x = 83,132,742.75/12,688.89
6. Step 6: Final answer
   x = 6,551.62