Finding the Fourth Proportional to 245,580.53, 338,920.81 and 138,144.15

Step by Step Solution

1. Step 1: Write the proportion equation
   245,580.53 : 338,920.81 = 138,144.15 : x
2. Step 2: Convert to fraction form
   245,580.53/338,920.81 = 138,144.15/x
3. Step 3: Cross multiply
   245,580.53x = 338,920.81 × 138,144.15
4. Step 4: Simplify right side
   245,580.53x = 46,819,926,869.40
5. Step 5: Solve for x
   x = 46,819,926,869.40/245,580.53
6. Step 6: Final answer
   x = 190,650.00