Finding the Fourth Proportional to 11,172.42, 16,761.31 and 3,380.74

Step by Step Solution

1. Step 1: Write the proportion equation
   11,172.42 : 16,761.31 = 3,380.74 : x
2. Step 2: Convert to fraction form
   11,172.42/16,761.31 = 3,380.74/x
3. Step 3: Cross multiply
   11,172.42x = 16,761.31 × 3,380.74
4. Step 4: Simplify right side
   11,172.42x = 56,665,631.17
5. Step 5: Solve for x
   x = 56,665,631.17/11,172.42
6. Step 6: Final answer
   x = 5,071.92