Finding the Fourth Proportional to 139,336.02, 209,000.39 and 49,377.42

Step by Step Solution

1. Step 1: Write the proportion equation
   139,336.02 : 209,000.39 = 49,377.42 : x
2. Step 2: Convert to fraction form
   139,336.02/209,000.39 = 49,377.42/x
3. Step 3: Cross multiply
   139,336.02x = 209,000.39 × 49,377.42
4. Step 4: Simplify right side
   139,336.02x = 10,319,899,790.31
5. Step 5: Solve for x
   x = 10,319,899,790.31/139,336.02
6. Step 6: Final answer
   x = 74,064.84