Finding the Fourth Proportional to 10,913.31, 16,278.15 and 10,585.35

Step by Step Solution

1. Step 1: Write the proportion equation
   10,913.31 : 16,278.15 = 10,585.35 : x
2. Step 2: Convert to fraction form
   10,913.31/16,278.15 = 10,585.35/x
3. Step 3: Cross multiply
   10,913.31x = 16,278.15 × 10,585.35
4. Step 4: Simplify right side
   10,913.31x = 172,309,860.18
5. Step 5: Solve for x
   x = 172,309,860.18/10,913.31
6. Step 6: Final answer
   x = 15,788.97