Finding the Fourth Proportional to 13,422.69, 18,524.12 and 7,758.45

Step by Step Solution

1. Step 1: Write the proportion equation
   13,422.69 : 18,524.12 = 7,758.45 : x
2. Step 2: Convert to fraction form
   13,422.69/18,524.12 = 7,758.45/x
3. Step 3: Cross multiply
   13,422.69x = 18,524.12 × 7,758.45
4. Step 4: Simplify right side
   13,422.69x = 143,718,420.02
5. Step 5: Solve for x
   x = 143,718,420.02/13,422.69
6. Step 6: Final answer
   x = 10,707.13