Finding the Fourth Proportional to 142,902, 197,210.25 and 79,238.43

Step by Step Solution

1. Step 1: Write the proportion equation
   142,902 : 197,210.25 = 79,238.43 : x
2. Step 2: Convert to fraction form
   142,902/197,210.25 = 79,238.43/x
3. Step 3: Cross multiply
   142,902x = 197,210.25 × 79,238.43
4. Step 4: Simplify right side
   142,902x = 15,626,630,589.91
5. Step 5: Solve for x
   x = 15,626,630,589.91/142,902
6. Step 6: Final answer
   x = 109,352.08