Finding the Fourth Proportional to 139,507.29, 209,148.21 and 49,500.39

Step by Step Solution

1. Step 1: Write the proportion equation
   139,507.29 : 209,148.21 = 49,500.39 : x
2. Step 2: Convert to fraction form
   139,507.29/209,148.21 = 49,500.39/x
3. Step 3: Cross multiply
   139,507.29x = 209,148.21 × 49,500.39
4. Step 4: Simplify right side
   139,507.29x = 10,352,917,962.80
5. Step 5: Solve for x
   x = 10,352,917,962.80/139,507.29
6. Step 6: Final answer
   x = 74,210.59