Finding the Fourth Proportional to 28,503.63, 42,747.96 and 8,508.42

Step by Step Solution

1. Step 1: Write the proportion equation
   28,503.63 : 42,747.96 = 8,508.42 : x
2. Step 2: Convert to fraction form
   28,503.63/42,747.96 = 8,508.42/x
3. Step 3: Cross multiply
   28,503.63x = 42,747.96 × 8,508.42
4. Step 4: Simplify right side
   28,503.63x = 363,717,597.82
5. Step 5: Solve for x
   x = 363,717,597.82/28,503.63
6. Step 6: Final answer
   x = 12,760.40