Finding the Fourth Proportional to 142,578.02, 196,753.74 and 81,322.82

Step by Step Solution

1. Step 1: Write the proportion equation
   142,578.02 : 196,753.74 = 81,322.82 : x
2. Step 2: Convert to fraction form
   142,578.02/196,753.74 = 81,322.82/x
3. Step 3: Cross multiply
   142,578.02x = 196,753.74 × 81,322.82
4. Step 4: Simplify right side
   142,578.02x = 16,000,567,998.58
5. Step 5: Solve for x
   x = 16,000,567,998.58/142,578.02
6. Step 6: Final answer
   x = 112,223.25