Finding the Fourth Proportional to 10,781.78, 16,173.43 and 3,386.81

Step by Step Solution

1. Step 1: Write the proportion equation
   10,781.78 : 16,173.43 = 3,386.81 : x
2. Step 2: Convert to fraction form
   10,781.78/16,173.43 = 3,386.81/x
3. Step 3: Cross multiply
   10,781.78x = 16,173.43 × 3,386.81
4. Step 4: Simplify right side
   10,781.78x = 54,776,366.42
5. Step 5: Solve for x
   x = 54,776,366.42/10,781.78
6. Step 6: Final answer
   x = 5,080.46