Finding the Fourth Proportional to 7,636.42, 10,459.28 and 7,188.10

Step by Step Solution

1. Step 1: Write the proportion equation
   7,636.42 : 10,459.28 = 7,188.10 : x
2. Step 2: Convert to fraction form
   7,636.42/10,459.28 = 7,188.10/x
3. Step 3: Cross multiply
   7,636.42x = 10,459.28 × 7,188.10
4. Step 4: Simplify right side
   7,636.42x = 75,182,350.57
5. Step 5: Solve for x
   x = 75,182,350.57/7,636.42
6. Step 6: Final answer
   x = 9,845.24