Finding the Fourth Proportional to 142,981.60, 214,326.60 and 83,786.80

Step by Step Solution

1. Step 1: Write the proportion equation
   142,981.60 : 214,326.60 = 83,786.80 : x
2. Step 2: Convert to fraction form
   142,981.60/214,326.60 = 83,786.80/x
3. Step 3: Cross multiply
   142,981.60x = 214,326.60 × 83,786.80
4. Step 4: Simplify right side
   142,981.60x = 17,957,739,968.88
5. Step 5: Solve for x
   x = 17,957,739,968.88/142,981.60
6. Step 6: Final answer
   x = 125,594.76