Finding the Fourth Proportional to 139,279.64, 209,002.46 and 50,540.06

Step by Step Solution

1. Step 1: Write the proportion equation
   139,279.64 : 209,002.46 = 50,540.06 : x
2. Step 2: Convert to fraction form
   139,279.64/209,002.46 = 50,540.06/x
3. Step 3: Cross multiply
   139,279.64x = 209,002.46 × 50,540.06
4. Step 4: Simplify right side
   139,279.64x = 10,562,995,570.84
5. Step 5: Solve for x
   x = 10,562,995,570.84/139,279.64
6. Step 6: Final answer
   x = 75,840.20