Finding the Fourth Proportional to 142,020.72, 196,013.95 and 84,663.74

Step by Step Solution

1. Step 1: Write the proportion equation
   142,020.72 : 196,013.95 = 84,663.74 : x
2. Step 2: Convert to fraction form
   142,020.72/196,013.95 = 84,663.74/x
3. Step 3: Cross multiply
   142,020.72x = 196,013.95 × 84,663.74
4. Step 4: Simplify right side
   142,020.72x = 16,595,274,099.17
5. Step 5: Solve for x
   x = 16,595,274,099.17/142,020.72
6. Step 6: Final answer
   x = 116,851.08