Finding the Fourth Proportional to 30,819.95, 42,530.83 and 17,390.86

Step by Step Solution

1. Step 1: Write the proportion equation
   30,819.95 : 42,530.83 = 17,390.86 : x
2. Step 2: Convert to fraction form
   30,819.95/42,530.83 = 17,390.86/x
3. Step 3: Cross multiply
   30,819.95x = 42,530.83 × 17,390.86
4. Step 4: Simplify right side
   30,819.95x = 739,647,710.21
5. Step 5: Solve for x
   x = 739,647,710.21/30,819.95
6. Step 6: Final answer
   x = 23,998.99