Finding the Fourth Proportional to 142,603.09, 196,793.72 and 78,939.52

Step by Step Solution

1. Step 1: Write the proportion equation
   142,603.09 : 196,793.72 = 78,939.52 : x
2. Step 2: Convert to fraction form
   142,603.09/196,793.72 = 78,939.52/x
3. Step 3: Cross multiply
   142,603.09x = 196,793.72 × 78,939.52
4. Step 4: Simplify right side
   142,603.09x = 15,534,801,205.16
5. Step 5: Solve for x
   x = 15,534,801,205.16/142,603.09
6. Step 6: Final answer
   x = 108,937.34