Finding the Fourth Proportional to 139,420.48, 209,131.41 and 34,239.46

Step by Step Solution

1. Step 1: Write the proportion equation
   139,420.48 : 209,131.41 = 34,239.46 : x
2. Step 2: Convert to fraction form
   139,420.48/209,131.41 = 34,239.46/x
3. Step 3: Cross multiply
   139,420.48x = 209,131.41 × 34,239.46
4. Step 4: Simplify right side
   139,420.48x = 7,160,545,501.78
5. Step 5: Solve for x
   x = 7,160,545,501.78/139,420.48
6. Step 6: Final answer
   x = 51,359.35