Finding the Fourth Proportional to 142,390.53, 196,507.35 and 81,959.67

Step by Step Solution

1. Step 1: Write the proportion equation
   142,390.53 : 196,507.35 = 81,959.67 : x
2. Step 2: Convert to fraction form
   142,390.53/196,507.35 = 81,959.67/x
3. Step 3: Cross multiply
   142,390.53x = 196,507.35 × 81,959.67
4. Step 4: Simplify right side
   142,390.53x = 16,105,677,558.57
5. Step 5: Solve for x
   x = 16,105,677,558.57/142,390.53
6. Step 6: Final answer
   x = 113,109.19