Finding the Fourth Proportional to 10,731.86, 16,080.15 and 10,321.79

Step by Step Solution

1. Step 1: Write the proportion equation
   10,731.86 : 16,080.15 = 10,321.79 : x
2. Step 2: Convert to fraction form
   10,731.86/16,080.15 = 10,321.79/x
3. Step 3: Cross multiply
   10,731.86x = 16,080.15 × 10,321.79
4. Step 4: Simplify right side
   10,731.86x = 165,975,851.07
5. Step 5: Solve for x
   x = 165,975,851.07/10,731.86
6. Step 6: Final answer
   x = 15,465.72