Finding the Fourth Proportional to 417,667.47, 625,080.87 and 257,843.94

Step by Step Solution

1. Step 1: Write the proportion equation
   417,667.47 : 625,080.87 = 257,843.94 : x
2. Step 2: Convert to fraction form
   417,667.47/625,080.87 = 257,843.94/x
3. Step 3: Cross multiply
   417,667.47x = 625,080.87 × 257,843.94
4. Step 4: Simplify right side
   417,667.47x = 161,173,314,339.43
5. Step 5: Solve for x
   x = 161,173,314,339.43/417,667.47
6. Step 6: Final answer
   x = 385,889.08