Finding the Fourth Proportional to 10,516.32, 15,742.96 and 10,142.47

Step by Step Solution

1. Step 1: Write the proportion equation
   10,516.32 : 15,742.96 = 10,142.47 : x
2. Step 2: Convert to fraction form
   10,516.32/15,742.96 = 10,142.47/x
3. Step 3: Cross multiply
   10,516.32x = 15,742.96 × 10,142.47
4. Step 4: Simplify right side
   10,516.32x = 159,672,499.51
5. Step 5: Solve for x
   x = 159,672,499.51/10,516.32
6. Step 6: Final answer
   x = 15,183.31