Finding the Fourth Proportional to 250,448.32, 345,616.72 and 137,270.80

Step by Step Solution

1. Step 1: Write the proportion equation
   250,448.32 : 345,616.72 = 137,270.80 : x
2. Step 2: Convert to fraction form
   250,448.32/345,616.72 = 137,270.80/x
3. Step 3: Cross multiply
   250,448.32x = 345,616.72 × 137,270.80
4. Step 4: Simplify right side
   250,448.32x = 47,443,083,647.78
5. Step 5: Solve for x
   x = 47,443,083,647.78/250,448.32
6. Step 6: Final answer
   x = 189,432.63