Finding the Fourth Proportional to 30,501.82, 42,079.98 and 18,563.20

Step by Step Solution

1. Step 1: Write the proportion equation
   30,501.82 : 42,079.98 = 18,563.20 : x
2. Step 2: Convert to fraction form
   30,501.82/42,079.98 = 18,563.20/x
3. Step 3: Cross multiply
   30,501.82x = 42,079.98 × 18,563.20
4. Step 4: Simplify right side
   30,501.82x = 781,139,084.74
5. Step 5: Solve for x
   x = 781,139,084.74/30,501.82
6. Step 6: Final answer
   x = 25,609.59