Finding the Fourth Proportional to 142,196.68, 196,223.34 and 81,757.72

Step by Step Solution

1. Step 1: Write the proportion equation
   142,196.68 : 196,223.34 = 81,757.72 : x
2. Step 2: Convert to fraction form
   142,196.68/196,223.34 = 81,757.72/x
3. Step 3: Cross multiply
   142,196.68x = 196,223.34 × 81,757.72
4. Step 4: Simplify right side
   142,196.68x = 16,042,772,889.18
5. Step 5: Solve for x
   x = 16,042,772,889.18/142,196.68
6. Step 6: Final answer
   x = 112,821.01