Finding the Fourth Proportional to 142,384.60, 213,431.10 and 83,189.80

Step by Step Solution

1. Step 1: Write the proportion equation
   142,384.60 : 213,431.10 = 83,189.80 : x
2. Step 2: Convert to fraction form
   142,384.60/213,431.10 = 83,189.80/x
3. Step 3: Cross multiply
   142,384.60x = 213,431.10 × 83,189.80
4. Step 4: Simplify right side
   142,384.60x = 17,755,290,522.78
5. Step 5: Solve for x
   x = 17,755,290,522.78/142,384.60
6. Step 6: Final answer
   x = 124,699.51