Finding the Fourth Proportional to 28,234.22, 42,367.72 and 12,651.85

Step by Step Solution

1. Step 1: Write the proportion equation
   28,234.22 : 42,367.72 = 12,651.85 : x
2. Step 2: Convert to fraction form
   28,234.22/42,367.72 = 12,651.85/x
3. Step 3: Cross multiply
   28,234.22x = 42,367.72 × 12,651.85
4. Step 4: Simplify right side
   28,234.22x = 536,030,038.28
5. Step 5: Solve for x
   x = 536,030,038.28/28,234.22
6. Step 6: Final answer
   x = 18,985.12