Finding the Fourth Proportional to 11,438.28, 17,148.90 and 7,730.10

Step by Step Solution

1. Step 1: Write the proportion equation
   11,438.28 : 17,148.90 = 7,730.10 : x
2. Step 2: Convert to fraction form
   11,438.28/17,148.90 = 7,730.10/x
3. Step 3: Cross multiply
   11,438.28x = 17,148.90 × 7,730.10
4. Step 4: Simplify right side
   11,438.28x = 132,562,711.89
5. Step 5: Solve for x
   x = 132,562,711.89/11,438.28
6. Step 6: Final answer
   x = 11,589.39