Finding the Fourth Proportional to 142,571.67, 196,748.15 and 78,907.29

Step by Step Solution

1. Step 1: Write the proportion equation
   142,571.67 : 196,748.15 = 78,907.29 : x
2. Step 2: Convert to fraction form
   142,571.67/196,748.15 = 78,907.29/x
3. Step 3: Cross multiply
   142,571.67x = 196,748.15 × 78,907.29
4. Step 4: Simplify right side
   142,571.67x = 15,524,862,345.27
5. Step 5: Solve for x
   x = 15,524,862,345.27/142,571.67
6. Step 6: Final answer
   x = 108,891.64