Finding the Fourth Proportional to 142,725.10, 214,120.05 and 83,530.30

Step by Step Solution

1. Step 1: Write the proportion equation
   142,725.10 : 214,120.05 = 83,530.30 : x
2. Step 2: Convert to fraction form
   142,725.10/214,120.05 = 83,530.30/x
3. Step 3: Cross multiply
   142,725.10x = 214,120.05 × 83,530.30
4. Step 4: Simplify right side
   142,725.10x = 17,885,512,012.52
5. Step 5: Solve for x
   x = 17,885,512,012.52/142,725.10
6. Step 6: Final answer
   x = 125,314.41