Finding the Fourth Proportional to 142,851.60, 214,131.60 and 83,656.80

Step by Step Solution

1. Step 1: Write the proportion equation
   142,851.60 : 214,131.60 = 83,656.80 : x
2. Step 2: Convert to fraction form
   142,851.60/214,131.60 = 83,656.80/x
3. Step 3: Cross multiply
   142,851.60x = 214,131.60 × 83,656.80
4. Step 4: Simplify right side
   142,851.60x = 17,913,564,434.88
5. Step 5: Solve for x
   x = 17,913,564,434.88/142,851.60
6. Step 6: Final answer
   x = 125,399.82