Finding the Fourth Proportional to 139,440.12, 209,185.29 and 50,818.02

Step by Step Solution

1. Step 1: Write the proportion equation
   139,440.12 : 209,185.29 = 50,818.02 : x
2. Step 2: Convert to fraction form
   139,440.12/209,185.29 = 50,818.02/x
3. Step 3: Cross multiply
   139,440.12x = 209,185.29 × 50,818.02
4. Step 4: Simplify right side
   139,440.12x = 10,630,382,250.93
5. Step 5: Solve for x
   x = 10,630,382,250.93/139,440.12
6. Step 6: Final answer
   x = 76,236.18