Finding the Fourth Proportional to 139,288.75, 209,016.15 and 50,549.19

Step by Step Solution

1. Step 1: Write the proportion equation
   139,288.75 : 209,016.15 = 50,549.19 : x
2. Step 2: Convert to fraction form
   139,288.75/209,016.15 = 50,549.19/x
3. Step 3: Cross multiply
   139,288.75x = 209,016.15 × 50,549.19
4. Step 4: Simplify right side
   139,288.75x = 10,565,596,826.67
5. Step 5: Solve for x
   x = 10,565,596,826.67/139,288.75
6. Step 6: Final answer
   x = 75,853.91