Finding the Fourth Proportional to 139,711.16, 209,581.74 and 59,757.43

Step by Step Solution

1. Step 1: Write the proportion equation
   139,711.16 : 209,581.74 = 59,757.43 : x
2. Step 2: Convert to fraction form
   139,711.16/209,581.74 = 59,757.43/x
3. Step 3: Cross multiply
   139,711.16x = 209,581.74 × 59,757.43
4. Step 4: Simplify right side
   139,711.16x = 12,524,066,307.26
5. Step 5: Solve for x
   x = 12,524,066,307.26/139,711.16
6. Step 6: Final answer
   x = 89,642.56