Finding the Fourth Proportional to 9,014.50, 12,439.36 and 5,428.77

Step by Step Solution

1. Step 1: Write the proportion equation
   9,014.50 : 12,439.36 = 5,428.77 : x
2. Step 2: Convert to fraction form
   9,014.50/12,439.36 = 5,428.77/x
3. Step 3: Cross multiply
   9,014.50x = 12,439.36 × 5,428.77
4. Step 4: Simplify right side
   9,014.50x = 67,530,424.39
5. Step 5: Solve for x
   x = 67,530,424.39/9,014.50
6. Step 6: Final answer
   x = 7,491.31