Finding the Fourth Proportional to 13,057.66, 18,019.87 and 7,752.49

Step by Step Solution

1. Step 1: Write the proportion equation
   13,057.66 : 18,019.87 = 7,752.49 : x
2. Step 2: Convert to fraction form
   13,057.66/18,019.87 = 7,752.49/x
3. Step 3: Cross multiply
   13,057.66x = 18,019.87 × 7,752.49
4. Step 4: Simplify right side
   13,057.66x = 139,698,752.50
5. Step 5: Solve for x
   x = 139,698,752.50/13,057.66
6. Step 6: Final answer
   x = 10,698.61