Finding the Fourth Proportional to 52,405.43, 72,318.35 and 30,605.45

Step by Step Solution

1. Step 1: Write the proportion equation
   52,405.43 : 72,318.35 = 30,605.45 : x
2. Step 2: Convert to fraction form
   52,405.43/72,318.35 = 30,605.45/x
3. Step 3: Cross multiply
   52,405.43x = 72,318.35 × 30,605.45
4. Step 4: Simplify right side
   52,405.43x = 2,213,335,735.41
5. Step 5: Solve for x
   x = 2,213,335,735.41/52,405.43
6. Step 6: Final answer
   x = 42,234.86