Finding the Fourth Proportional to 139,479.22, 209,307.93 and 50,724.28

Step by Step Solution

1. Step 1: Write the proportion equation
   139,479.22 : 209,307.93 = 50,724.28 : x
2. Step 2: Convert to fraction form
   139,479.22/209,307.93 = 50,724.28/x
3. Step 3: Cross multiply
   139,479.22x = 209,307.93 × 50,724.28
4. Step 4: Simplify right side
   139,479.22x = 10,616,993,001.00
5. Step 5: Solve for x
   x = 10,616,993,001.00/139,479.22
6. Step 6: Final answer
   x = 76,118.82