Finding the Fourth Proportional to 10,688.42, 16,038.39 and 10,300.58

Step by Step Solution

1. Step 1: Write the proportion equation
   10,688.42 : 16,038.39 = 10,300.58 : x
2. Step 2: Convert to fraction form
   10,688.42/16,038.39 = 10,300.58/x
3. Step 3: Cross multiply
   10,688.42x = 16,038.39 × 10,300.58
4. Step 4: Simplify right side
   10,688.42x = 165,204,719.27
5. Step 5: Solve for x
   x = 165,204,719.27/10,688.42
6. Step 6: Final answer
   x = 15,456.42