Finding the Fourth Proportional to 22,251, 30,707.82 and 12,315

Step by Step Solution

1. Step 1: Write the proportion equation
   22,251 : 30,707.82 = 12,315 : x
2. Step 2: Convert to fraction form
   22,251/30,707.82 = 12,315/x
3. Step 3: Cross multiply
   22,251x = 30,707.82 × 12,315
4. Step 4: Simplify right side
   22,251x = 378,166,803.30
5. Step 5: Solve for x
   x = 378,166,803.30/22,251
6. Step 6: Final answer
   x = 16,995.50