Finding the Fourth Proportional to 42,499.50, 63,749.22 and 20,245.44

Step by Step Solution

1. Step 1: Write the proportion equation
   42,499.50 : 63,749.22 = 20,245.44 : x
2. Step 2: Convert to fraction form
   42,499.50/63,749.22 = 20,245.44/x
3. Step 3: Cross multiply
   42,499.50x = 63,749.22 × 20,245.44
4. Step 4: Simplify right side
   42,499.50x = 1,290,631,008.56
5. Step 5: Solve for x
   x = 1,290,631,008.56/42,499.50
6. Step 6: Final answer
   x = 30,368.15