Finding the Fourth Proportional to 142,595.51, 196,799.39 and 81,356.78

Step by Step Solution

1. Step 1: Write the proportion equation
   142,595.51 : 196,799.39 = 81,356.78 : x
2. Step 2: Convert to fraction form
   142,595.51/196,799.39 = 81,356.78/x
3. Step 3: Cross multiply
   142,595.51x = 196,799.39 × 81,356.78
4. Step 4: Simplify right side
   142,595.51x = 16,010,964,786.30
5. Step 5: Solve for x
   x = 16,010,964,786.30/142,595.51
6. Step 6: Final answer
   x = 112,282.39