Finding the Fourth Proportional to 139,710.21, 209,563.25 and 34,529.15

Step by Step Solution

1. Step 1: Write the proportion equation
   139,710.21 : 209,563.25 = 34,529.15 : x
2. Step 2: Convert to fraction form
   139,710.21/209,563.25 = 34,529.15/x
3. Step 3: Cross multiply
   139,710.21x = 209,563.25 × 34,529.15
4. Step 4: Simplify right side
   139,710.21x = 7,236,039,673.28
5. Step 5: Solve for x
   x = 7,236,039,673.28/139,710.21
6. Step 6: Final answer
   x = 51,793.21