Finding the Fourth Proportional to 10,665.80, 15,905.38 and 10,083.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,665.80 : 15,905.38 = 10,083.50 : x
2. Step 2: Convert to fraction form
   10,665.80/15,905.38 = 10,083.50/x
3. Step 3: Cross multiply
   10,665.80x = 15,905.38 × 10,083.50
4. Step 4: Simplify right side
   10,665.80x = 160,381,899.23
5. Step 5: Solve for x
   x = 160,381,899.23/10,665.80
6. Step 6: Final answer
   x = 15,037.02