Finding the Fourth Proportional to 200,039.34, 300,059.37 and 81,710.70

Step by Step Solution

1. Step 1: Write the proportion equation
   200,039.34 : 300,059.37 = 81,710.70 : x
2. Step 2: Convert to fraction form
   200,039.34/300,059.37 = 81,710.70/x
3. Step 3: Cross multiply
   200,039.34x = 300,059.37 × 81,710.70
4. Step 4: Simplify right side
   200,039.34x = 24,518,061,164.26
5. Step 5: Solve for x
   x = 24,518,061,164.26/200,039.34
6. Step 6: Final answer
   x = 122,566.20