Finding the Fourth Proportional to 10,689.45, 16,037.63 and 5,142.07

Step by Step Solution

1. Step 1: Write the proportion equation
   10,689.45 : 16,037.63 = 5,142.07 : x
2. Step 2: Convert to fraction form
   10,689.45/16,037.63 = 5,142.07/x
3. Step 3: Cross multiply
   10,689.45x = 16,037.63 × 5,142.07
4. Step 4: Simplify right side
   10,689.45x = 82,466,629.71
5. Step 5: Solve for x
   x = 82,466,629.71/10,689.45
6. Step 6: Final answer
   x = 7,714.77