Finding the Fourth Proportional to 139,711.29, 209,581.94 and 59,757.56

Step by Step Solution

1. Step 1: Write the proportion equation
   139,711.29 : 209,581.94 = 59,757.56 : x
2. Step 2: Convert to fraction form
   139,711.29/209,581.94 = 59,757.56/x
3. Step 3: Cross multiply
   139,711.29x = 209,581.94 × 59,757.56
4. Step 4: Simplify right side
   139,711.29x = 12,524,106,121.99
5. Step 5: Solve for x
   x = 12,524,106,121.99/139,711.29
6. Step 6: Final answer
   x = 89,642.76