Finding the Fourth Proportional to 10,978.68, 16,463.42 and 6,812.44

Step by Step Solution

1. Step 1: Write the proportion equation
   10,978.68 : 16,463.42 = 6,812.44 : x
2. Step 2: Convert to fraction form
   10,978.68/16,463.42 = 6,812.44/x
3. Step 3: Cross multiply
   10,978.68x = 16,463.42 × 6,812.44
4. Step 4: Simplify right side
   10,978.68x = 112,156,060.94
5. Step 5: Solve for x
   x = 112,156,060.94/10,978.68
6. Step 6: Final answer
   x = 10,215.81