Finding the Fourth Proportional to 139,017.23, 208,542.04 and 50,312.51

Step by Step Solution

1. Step 1: Write the proportion equation
   139,017.23 : 208,542.04 = 50,312.51 : x
2. Step 2: Convert to fraction form
   139,017.23/208,542.04 = 50,312.51/x
3. Step 3: Cross multiply
   139,017.23x = 208,542.04 × 50,312.51
4. Step 4: Simplify right side
   139,017.23x = 10,492,273,369.47
5. Step 5: Solve for x
   x = 10,492,273,369.47/139,017.23
6. Step 6: Final answer
   x = 75,474.63