Finding the Fourth Proportional to 142,650.16, 196,857.16 and 78,992

Step by Step Solution

1. Step 1: Write the proportion equation
   142,650.16 : 196,857.16 = 78,992 : x
2. Step 2: Convert to fraction form
   142,650.16/196,857.16 = 78,992/x
3. Step 3: Cross multiply
   142,650.16x = 196,857.16 × 78,992
4. Step 4: Simplify right side
   142,650.16x = 15,550,140,782.72
5. Step 5: Solve for x
   x = 15,550,140,782.72/142,650.16
6. Step 6: Final answer
   x = 109,008.93