Finding the Fourth Proportional to 11,860.32, 16,368.57 and 7,144.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,860.32 : 16,368.57 = 7,144.50 : x
2. Step 2: Convert to fraction form
   11,860.32/16,368.57 = 7,144.50/x
3. Step 3: Cross multiply
   11,860.32x = 16,368.57 × 7,144.50
4. Step 4: Simplify right side
   11,860.32x = 116,945,248.37
5. Step 5: Solve for x
   x = 116,945,248.37/11,860.32
6. Step 6: Final answer
   x = 9,860.21