Finding the Fourth Proportional to 142,868.07, 197,147.16 and 78,327

Step by Step Solution

1. Step 1: Write the proportion equation
   142,868.07 : 197,147.16 = 78,327 : x
2. Step 2: Convert to fraction form
   142,868.07/197,147.16 = 78,327/x
3. Step 3: Cross multiply
   142,868.07x = 197,147.16 × 78,327
4. Step 4: Simplify right side
   142,868.07x = 15,441,945,601.32
5. Step 5: Solve for x
   x = 15,441,945,601.32/142,868.07
6. Step 6: Final answer
   x = 108,085.35