Finding the Fourth Proportional to 492,488.05, 738,600.72 and 137,439.67

Step by Step Solution

1. Step 1: Write the proportion equation
   492,488.05 : 738,600.72 = 137,439.67 : x
2. Step 2: Convert to fraction form
   492,488.05/738,600.72 = 137,439.67/x
3. Step 3: Cross multiply
   492,488.05x = 738,600.72 × 137,439.67
4. Step 4: Simplify right side
   492,488.05x = 101,513,039,218.56
5. Step 5: Solve for x
   x = 101,513,039,218.56/492,488.05
6. Step 6: Final answer
   x = 206,122.85