Finding the Fourth Proportional to 12,860.37, 17,742.24 and 8,077.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,860.37 : 17,742.24 = 8,077.50 : x
2. Step 2: Convert to fraction form
   12,860.37/17,742.24 = 8,077.50/x
3. Step 3: Cross multiply
   12,860.37x = 17,742.24 × 8,077.50
4. Step 4: Simplify right side
   12,860.37x = 143,312,943.60
5. Step 5: Solve for x
   x = 143,312,943.60/12,860.37
6. Step 6: Final answer
   x = 11,143.77