Finding the Fourth Proportional to 142,685.55, 213,831.50 and 107,586.63

Step by Step Solution

1. Step 1: Write the proportion equation
   142,685.55 : 213,831.50 = 107,586.63 : x
2. Step 2: Convert to fraction form
   142,685.55/213,831.50 = 107,586.63/x
3. Step 3: Cross multiply
   142,685.55x = 213,831.50 × 107,586.63
4. Step 4: Simplify right side
   142,685.55x = 23,005,409,934.91
5. Step 5: Solve for x
   x = 23,005,409,934.91/142,685.55
6. Step 6: Final answer
   x = 161,231.53