Finding the Fourth Proportional to 7,188.84, 9,855.90 and 7,057.62

Step by Step Solution

1. Step 1: Write the proportion equation
   7,188.84 : 9,855.90 = 7,057.62 : x
2. Step 2: Convert to fraction form
   7,188.84/9,855.90 = 7,057.62/x
3. Step 3: Cross multiply
   7,188.84x = 9,855.90 × 7,057.62
4. Step 4: Simplify right side
   7,188.84x = 69,559,196.96
5. Step 5: Solve for x
   x = 69,559,196.96/7,188.84
6. Step 6: Final answer
   x = 9,676.00