Finding the Fourth Proportional to 142,570.67, 196,746.77 and 78,906.29

Step by Step Solution

1. Step 1: Write the proportion equation
   142,570.67 : 196,746.77 = 78,906.29 : x
2. Step 2: Convert to fraction form
   142,570.67/196,746.77 = 78,906.29/x
3. Step 3: Cross multiply
   142,570.67x = 196,746.77 × 78,906.29
4. Step 4: Simplify right side
   142,570.67x = 15,524,556,903.72
5. Step 5: Solve for x
   x = 15,524,556,903.72/142,570.67
6. Step 6: Final answer
   x = 108,890.26