Finding the Fourth Proportional to 42,431.24, 63,638.66 and 40,323.83

Step by Step Solution

1. Step 1: Write the proportion equation
   42,431.24 : 63,638.66 = 40,323.83 : x
2. Step 2: Convert to fraction form
   42,431.24/63,638.66 = 40,323.83/x
3. Step 3: Cross multiply
   42,431.24x = 63,638.66 × 40,323.83
4. Step 4: Simplify right side
   42,431.24x = 2,566,154,289.88
5. Step 5: Solve for x
   x = 2,566,154,289.88/42,431.24
6. Step 6: Final answer
   x = 60,477.94