Finding the Fourth Proportional to 12,487.71, 18,715.41 and 5,083.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,487.71 : 18,715.41 = 5,083.50 : x
2. Step 2: Convert to fraction form
   12,487.71/18,715.41 = 5,083.50/x
3. Step 3: Cross multiply
   12,487.71x = 18,715.41 × 5,083.50
4. Step 4: Simplify right side
   12,487.71x = 95,139,786.74
5. Step 5: Solve for x
   x = 95,139,786.74/12,487.71
6. Step 6: Final answer
   x = 7,618.67