Finding the Fourth Proportional to 139,003.16, 208,517 and 39,164.20

Step by Step Solution

1. Step 1: Write the proportion equation
   139,003.16 : 208,517 = 39,164.20 : x
2. Step 2: Convert to fraction form
   139,003.16/208,517 = 39,164.20/x
3. Step 3: Cross multiply
   139,003.16x = 208,517 × 39,164.20
4. Step 4: Simplify right side
   139,003.16x = 8,166,401,491.40
5. Step 5: Solve for x
   x = 8,166,401,491.40/139,003.16
6. Step 6: Final answer
   x = 58,749.75