Finding the Fourth Proportional to 142,552.37, 196,722.51 and 78,890.18

Step by Step Solution

1. Step 1: Write the proportion equation
   142,552.37 : 196,722.51 = 78,890.18 : x
2. Step 2: Convert to fraction form
   142,552.37/196,722.51 = 78,890.18/x
3. Step 3: Cross multiply
   142,552.37x = 196,722.51 × 78,890.18
4. Step 4: Simplify right side
   142,552.37x = 15,519,473,240.34
5. Step 5: Solve for x
   x = 15,519,473,240.34/142,552.37
6. Step 6: Final answer
   x = 108,868.58