Finding the Fourth Proportional to 28,322.70, 42,481.29 and 8,601.42

Step by Step Solution

1. Step 1: Write the proportion equation
   28,322.70 : 42,481.29 = 8,601.42 : x
2. Step 2: Convert to fraction form
   28,322.70/42,481.29 = 8,601.42/x
3. Step 3: Cross multiply
   28,322.70x = 42,481.29 × 8,601.42
4. Step 4: Simplify right side
   28,322.70x = 365,399,417.43
5. Step 5: Solve for x
   x = 365,399,417.43/28,322.70
6. Step 6: Final answer
   x = 12,901.29