Finding the Fourth Proportional to 22,346.42, 30,830.51 and 12,779.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,346.42 : 30,830.51 = 12,779.50 : x
2. Step 2: Convert to fraction form
   22,346.42/30,830.51 = 12,779.50/x
3. Step 3: Cross multiply
   22,346.42x = 30,830.51 × 12,779.50
4. Step 4: Simplify right side
   22,346.42x = 393,998,361.57
5. Step 5: Solve for x
   x = 393,998,361.57/22,346.42
6. Step 6: Final answer
   x = 17,631.39