Finding the Fourth Proportional to 139,075.54, 208,521.13 and 50,317.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,075.54 : 208,521.13 = 50,317.50 : x
2. Step 2: Convert to fraction form
   139,075.54/208,521.13 = 50,317.50/x
3. Step 3: Cross multiply
   139,075.54x = 208,521.13 × 50,317.50
4. Step 4: Simplify right side
   139,075.54x = 10,492,261,958.78
5. Step 5: Solve for x
   x = 10,492,261,958.78/139,075.54
6. Step 6: Final answer
   x = 75,442.90