Finding the Fourth Proportional to 142,072.69, 196,085.74 and 84,715.72

Step by Step Solution

1. Step 1: Write the proportion equation
   142,072.69 : 196,085.74 = 84,715.72 : x
2. Step 2: Convert to fraction form
   142,072.69/196,085.74 = 84,715.72/x
3. Step 3: Cross multiply
   142,072.69x = 196,085.74 × 84,715.72
4. Step 4: Simplify right side
   142,072.69x = 16,611,544,645.83
5. Step 5: Solve for x
   x = 16,611,544,645.83/142,072.69
6. Step 6: Final answer
   x = 116,922.86