Finding the Fourth Proportional to 142,655.67, 196,864.69 and 78,993.47

Step by Step Solution

1. Step 1: Write the proportion equation
   142,655.67 : 196,864.69 = 78,993.47 : x
2. Step 2: Convert to fraction form
   142,655.67/196,864.69 = 78,993.47/x
3. Step 3: Cross multiply
   142,655.67x = 196,864.69 × 78,993.47
4. Step 4: Simplify right side
   142,655.67x = 15,551,024,983.57
5. Step 5: Solve for x
   x = 15,551,024,983.57/142,655.67
6. Step 6: Final answer
   x = 109,010.91