Finding the Fourth Proportional to 30,940.30, 42,697.59 and 17,511.31

Step by Step Solution

1. Step 1: Write the proportion equation
   30,940.30 : 42,697.59 = 17,511.31 : x
2. Step 2: Convert to fraction form
   30,940.30/42,697.59 = 17,511.31/x
3. Step 3: Cross multiply
   30,940.30x = 42,697.59 × 17,511.31
4. Step 4: Simplify right side
   30,940.30x = 747,690,734.74
5. Step 5: Solve for x
   x = 747,690,734.74/30,940.30
6. Step 6: Final answer
   x = 24,165.59