Finding the Fourth Proportional to 245,401.65, 338,645.61 and 137,977.83

Step by Step Solution

1. Step 1: Write the proportion equation
   245,401.65 : 338,645.61 = 137,977.83 : x
2. Step 2: Convert to fraction form
   245,401.65/338,645.61 = 137,977.83/x
3. Step 3: Cross multiply
   245,401.65x = 338,645.61 × 137,977.83
4. Step 4: Simplify right side
   245,401.65x = 46,725,586,406.83
5. Step 5: Solve for x
   x = 46,725,586,406.83/245,401.65
6. Step 6: Final answer
   x = 190,404.53