Finding the Fourth Proportional to 12,889.28, 17,787.24 and 7,300.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,889.28 : 17,787.24 = 7,300.28 : x
2. Step 2: Convert to fraction form
   12,889.28/17,787.24 = 7,300.28/x
3. Step 3: Cross multiply
   12,889.28x = 17,787.24 × 7,300.28
4. Step 4: Simplify right side
   12,889.28x = 129,851,832.43
5. Step 5: Solve for x
   x = 129,851,832.43/12,889.28
6. Step 6: Final answer
   x = 10,074.41