Finding the Fourth Proportional to 142,655.37, 196,864.40 and 78,993.17

Step by Step Solution

1. Step 1: Write the proportion equation
   142,655.37 : 196,864.40 = 78,993.17 : x
2. Step 2: Convert to fraction form
   142,655.37/196,864.40 = 78,993.17/x
3. Step 3: Cross multiply
   142,655.37x = 196,864.40 × 78,993.17
4. Step 4: Simplify right side
   142,655.37x = 15,550,941,636.86
5. Step 5: Solve for x
   x = 15,550,941,636.86/142,655.37
6. Step 6: Final answer
   x = 109,010.56