Finding the Fourth Proportional to 142,231.76, 196,288.23 and 81,819.53

Step by Step Solution

1. Step 1: Write the proportion equation
   142,231.76 : 196,288.23 = 81,819.53 : x
2. Step 2: Convert to fraction form
   142,231.76/196,288.23 = 81,819.53/x
3. Step 3: Cross multiply
   142,231.76x = 196,288.23 × 81,819.53
4. Step 4: Simplify right side
   142,231.76x = 16,060,209,741.69
5. Step 5: Solve for x
   x = 16,060,209,741.69/142,231.76
6. Step 6: Final answer
   x = 112,915.78