Finding the Fourth Proportional to 22,253.50, 30,709.86 and 13,870

Step by Step Solution

1. Step 1: Write the proportion equation
   22,253.50 : 30,709.86 = 13,870 : x
2. Step 2: Convert to fraction form
   22,253.50/30,709.86 = 13,870/x
3. Step 3: Cross multiply
   22,253.50x = 30,709.86 × 13,870
4. Step 4: Simplify right side
   22,253.50x = 425,945,758.20
5. Step 5: Solve for x
   x = 425,945,758.20/22,253.50
6. Step 6: Final answer
   x = 19,140.62