Finding the Fourth Proportional to 139,861.35, 209,790.46 and 83,717.12

Step by Step Solution

1. Step 1: Write the proportion equation
   139,861.35 : 209,790.46 = 83,717.12 : x
2. Step 2: Convert to fraction form
   139,861.35/209,790.46 = 83,717.12/x
3. Step 3: Cross multiply
   139,861.35x = 209,790.46 × 83,717.12
4. Step 4: Simplify right side
   139,861.35x = 17,563,052,682.85
5. Step 5: Solve for x
   x = 17,563,052,682.85/139,861.35
6. Step 6: Final answer
   x = 125,574.74