Finding the Fourth Proportional to 30,740.56, 42,432.60 and 18,164.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,740.56 : 42,432.60 = 18,164.50 : x
2. Step 2: Convert to fraction form
   30,740.56/42,432.60 = 18,164.50/x
3. Step 3: Cross multiply
   30,740.56x = 42,432.60 × 18,164.50
4. Step 4: Simplify right side
   30,740.56x = 770,766,962.70
5. Step 5: Solve for x
   x = 770,766,962.70/30,740.56
6. Step 6: Final answer
   x = 25,073.29