Finding the Fourth Proportional to 142,910.10, 214,219.35 and 83,715.30

Step by Step Solution

1. Step 1: Write the proportion equation
   142,910.10 : 214,219.35 = 83,715.30 : x
2. Step 2: Convert to fraction form
   142,910.10/214,219.35 = 83,715.30/x
3. Step 3: Cross multiply
   142,910.10x = 214,219.35 × 83,715.30
4. Step 4: Simplify right side
   142,910.10x = 17,933,437,151.06
5. Step 5: Solve for x
   x = 17,933,437,151.06/142,910.10
6. Step 6: Final answer
   x = 125,487.54