Finding the Fourth Proportional to 50,075.18, 75,107.89 and 13,139.18

Step by Step Solution

1. Step 1: Write the proportion equation
   50,075.18 : 75,107.89 = 13,139.18 : x
2. Step 2: Convert to fraction form
   50,075.18/75,107.89 = 13,139.18/x
3. Step 3: Cross multiply
   50,075.18x = 75,107.89 × 13,139.18
4. Step 4: Simplify right side
   50,075.18x = 986,856,086.13
5. Step 5: Solve for x
   x = 986,856,086.13/50,075.18
6. Step 6: Final answer
   x = 19,707.49