Finding the Fourth Proportional to 42,749.93, 64,113.91 and 20,238.41

Step by Step Solution

1. Step 1: Write the proportion equation
   42,749.93 : 64,113.91 = 20,238.41 : x
2. Step 2: Convert to fraction form
   42,749.93/64,113.91 = 20,238.41/x
3. Step 3: Cross multiply
   42,749.93x = 64,113.91 × 20,238.41
4. Step 4: Simplify right side
   42,749.93x = 1,297,563,597.28
5. Step 5: Solve for x
   x = 1,297,563,597.28/42,749.93
6. Step 6: Final answer
   x = 30,352.41