Finding the Fourth Proportional to 22,318.86, 30,790.30 and 13,818.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,318.86 : 30,790.30 = 13,818.72 : x
2. Step 2: Convert to fraction form
   22,318.86/30,790.30 = 13,818.72/x
3. Step 3: Cross multiply
   22,318.86x = 30,790.30 × 13,818.72
4. Step 4: Simplify right side
   22,318.86x = 425,482,534.42
5. Step 5: Solve for x
   x = 425,482,534.42/22,318.86
6. Step 6: Final answer
   x = 19,063.81