Finding the Fourth Proportional to 407,064.42, 561,381.37 and 254,116.71

Step by Step Solution

1. Step 1: Write the proportion equation
   407,064.42 : 561,381.37 = 254,116.71 : x
2. Step 2: Convert to fraction form
   407,064.42/561,381.37 = 254,116.71/x
3. Step 3: Cross multiply
   407,064.42x = 561,381.37 × 254,116.71
4. Step 4: Simplify right side
   407,064.42x = 142,656,386,164.40
5. Step 5: Solve for x
   x = 142,656,386,164.40/407,064.42
6. Step 6: Final answer
   x = 350,451.62