Finding the Fourth Proportional to 142,685.76, 196,996.80 and 91,722.24

Step by Step Solution

1. Step 1: Write the proportion equation
   142,685.76 : 196,996.80 = 91,722.24 : x
2. Step 2: Convert to fraction form
   142,685.76/196,996.80 = 91,722.24/x
3. Step 3: Cross multiply
   142,685.76x = 196,996.80 × 91,722.24
4. Step 4: Simplify right side
   142,685.76x = 18,068,987,768.83
5. Step 5: Solve for x
   x = 18,068,987,768.83/142,685.76
6. Step 6: Final answer
   x = 126,634.84