Finding the Fourth Proportional to 139,401.28, 209,103 and 34,221.16

Step by Step Solution

1. Step 1: Write the proportion equation
   139,401.28 : 209,103 = 34,221.16 : x
2. Step 2: Convert to fraction form
   139,401.28/209,103 = 34,221.16/x
3. Step 3: Cross multiply
   139,401.28x = 209,103 × 34,221.16
4. Step 4: Simplify right side
   139,401.28x = 7,155,747,219.48
5. Step 5: Solve for x
   x = 7,155,747,219.48/139,401.28
6. Step 6: Final answer
   x = 51,332.01