Finding the Fourth Proportional to 142,081.55, 196,058.58 and 78,415.24

Step by Step Solution

1. Step 1: Write the proportion equation
   142,081.55 : 196,058.58 = 78,415.24 : x
2. Step 2: Convert to fraction form
   142,081.55/196,058.58 = 78,415.24/x
3. Step 3: Cross multiply
   142,081.55x = 196,058.58 × 78,415.24
4. Step 4: Simplify right side
   142,081.55x = 15,373,980,604.76
5. Step 5: Solve for x
   x = 15,373,980,604.76/142,081.55
6. Step 6: Final answer
   x = 108,205.33