Finding the Fourth Proportional to 142,842.34, 197,116.77 and 78,310.18

Step by Step Solution

1. Step 1: Write the proportion equation
   142,842.34 : 197,116.77 = 78,310.18 : x
2. Step 2: Convert to fraction form
   142,842.34/197,116.77 = 78,310.18/x
3. Step 3: Cross multiply
   142,842.34x = 197,116.77 × 78,310.18
4. Step 4: Simplify right side
   142,842.34x = 15,436,249,739.72
5. Step 5: Solve for x
   x = 15,436,249,739.72/142,842.34
6. Step 6: Final answer
   x = 108,064.95