Finding the Fourth Proportional to 9,005.96, 12,428.70 and 5,028.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,005.96 : 12,428.70 = 5,028.05 : x
2. Step 2: Convert to fraction form
   9,005.96/12,428.70 = 5,028.05/x
3. Step 3: Cross multiply
   9,005.96x = 12,428.70 × 5,028.05
4. Step 4: Simplify right side
   9,005.96x = 62,492,125.04
5. Step 5: Solve for x
   x = 62,492,125.04/9,005.96
6. Step 6: Final answer
   x = 6,938.97