Finding the Fourth Proportional to 42,235.89, 63,365.79 and 21,150.48

Step by Step Solution

1. Step 1: Write the proportion equation
   42,235.89 : 63,365.79 = 21,150.48 : x
2. Step 2: Convert to fraction form
   42,235.89/63,365.79 = 21,150.48/x
3. Step 3: Cross multiply
   42,235.89x = 63,365.79 × 21,150.48
4. Step 4: Simplify right side
   42,235.89x = 1,340,216,874.08
5. Step 5: Solve for x
   x = 1,340,216,874.08/42,235.89
6. Step 6: Final answer
   x = 31,731.71