Finding the Fourth Proportional to 42,540.39, 63,771.15 and 18,835.31

Step by Step Solution

1. Step 1: Write the proportion equation
   42,540.39 : 63,771.15 = 18,835.31 : x
2. Step 2: Convert to fraction form
   42,540.39/63,771.15 = 18,835.31/x
3. Step 3: Cross multiply
   42,540.39x = 63,771.15 × 18,835.31
4. Step 4: Simplify right side
   42,540.39x = 1,201,149,060.45
5. Step 5: Solve for x
   x = 1,201,149,060.45/42,540.39
6. Step 6: Final answer
   x = 28,235.50