Finding the Fourth Proportional to 142,339.67, 196,448.28 and 81,909.08

Step by Step Solution

1. Step 1: Write the proportion equation
   142,339.67 : 196,448.28 = 81,909.08 : x
2. Step 2: Convert to fraction form
   142,339.67/196,448.28 = 81,909.08/x
3. Step 3: Cross multiply
   142,339.67x = 196,448.28 × 81,909.08
4. Step 4: Simplify right side
   142,339.67x = 16,090,897,882.38
5. Step 5: Solve for x
   x = 16,090,897,882.38/142,339.67
6. Step 6: Final answer
   x = 113,045.77