Finding the Fourth Proportional to 10,981.66, 16,478.80 and 10,892.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,981.66 : 16,478.80 = 10,892.50 : x
2. Step 2: Convert to fraction form
   10,981.66/16,478.80 = 10,892.50/x
3. Step 3: Cross multiply
   10,981.66x = 16,478.80 × 10,892.50
4. Step 4: Simplify right side
   10,981.66x = 179,495,329
5. Step 5: Solve for x
   x = 179,495,329/10,981.66
6. Step 6: Final answer
   x = 16,345.01