Finding the Fourth Proportional to 12,889.69, 17,787.78 and 7,300.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,889.69 : 17,787.78 = 7,300.69 : x
2. Step 2: Convert to fraction form
   12,889.69/17,787.78 = 7,300.69/x
3. Step 3: Cross multiply
   12,889.69x = 17,787.78 × 7,300.69
4. Step 4: Simplify right side
   12,889.69x = 129,863,023.10
5. Step 5: Solve for x
   x = 129,863,023.10/12,889.69
6. Step 6: Final answer
   x = 10,074.96