Finding the Fourth Proportional to 139,078.18, 208,525.11 and 50,320

Step by Step Solution

1. Step 1: Write the proportion equation
   139,078.18 : 208,525.11 = 50,320 : x
2. Step 2: Convert to fraction form
   139,078.18/208,525.11 = 50,320/x
3. Step 3: Cross multiply
   139,078.18x = 208,525.11 × 50,320
4. Step 4: Simplify right side
   139,078.18x = 10,492,983,535.20
5. Step 5: Solve for x
   x = 10,492,983,535.20/139,078.18
6. Step 6: Final answer
   x = 75,446.66