Finding the Fourth Proportional to 139,401.47, 209,106.31 and 34,220.44

Step by Step Solution

1. Step 1: Write the proportion equation
   139,401.47 : 209,106.31 = 34,220.44 : x
2. Step 2: Convert to fraction form
   139,401.47/209,106.31 = 34,220.44/x
3. Step 3: Cross multiply
   139,401.47x = 209,106.31 × 34,220.44
4. Step 4: Simplify right side
   139,401.47x = 7,155,709,326.66
5. Step 5: Solve for x
   x = 7,155,709,326.66/139,401.47
6. Step 6: Final answer
   x = 51,331.66