Finding the Fourth Proportional to 139,713.42, 209,443.74 and 50,946.16

Step by Step Solution

1. Step 1: Write the proportion equation
   139,713.42 : 209,443.74 = 50,946.16 : x
2. Step 2: Convert to fraction form
   139,713.42/209,443.74 = 50,946.16/x
3. Step 3: Cross multiply
   139,713.42x = 209,443.74 × 50,946.16
4. Step 4: Simplify right side
   139,713.42x = 10,670,354,289.04
5. Step 5: Solve for x
   x = 10,670,354,289.04/139,713.42
6. Step 6: Final answer
   x = 76,373.15