Finding the Fourth Proportional to 42,421.42, 63,632.06 and 10,831.46

Step by Step Solution

1. Step 1: Write the proportion equation
   42,421.42 : 63,632.06 = 10,831.46 : x
2. Step 2: Convert to fraction form
   42,421.42/63,632.06 = 10,831.46/x
3. Step 3: Cross multiply
   42,421.42x = 63,632.06 × 10,831.46
4. Step 4: Simplify right side
   42,421.42x = 689,228,058.45
5. Step 5: Solve for x
   x = 689,228,058.45/42,421.42
6. Step 6: Final answer
   x = 16,247.17