Finding the Fourth Proportional to 142,706.10, 214,091.55 and 83,511.30

Step by Step Solution

1. Step 1: Write the proportion equation
   142,706.10 : 214,091.55 = 83,511.30 : x
2. Step 2: Convert to fraction form
   142,706.10/214,091.55 = 83,511.30/x
3. Step 3: Cross multiply
   142,706.10x = 214,091.55 × 83,511.30
4. Step 4: Simplify right side
   142,706.10x = 17,879,063,659.52
5. Step 5: Solve for x
   x = 17,879,063,659.52/142,706.10
6. Step 6: Final answer
   x = 125,285.91