Finding the Fourth Proportional to 12,428.92, 17,129.37 and 9,066.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,428.92 : 17,129.37 = 9,066.34 : x
2. Step 2: Convert to fraction form
   12,428.92/17,129.37 = 9,066.34/x
3. Step 3: Cross multiply
   12,428.92x = 17,129.37 × 9,066.34
4. Step 4: Simplify right side
   12,428.92x = 155,300,692.41
5. Step 5: Solve for x
   x = 155,300,692.41/12,428.92
6. Step 6: Final answer
   x = 12,495.11