Finding the Fourth Proportional to 465,085.42, 641,835.86 and 258,369.46

Step by Step Solution

1. Step 1: Write the proportion equation
   465,085.42 : 641,835.86 = 258,369.46 : x
2. Step 2: Convert to fraction form
   465,085.42/641,835.86 = 258,369.46/x
3. Step 3: Cross multiply
   465,085.42x = 641,835.86 × 258,369.46
4. Step 4: Simplify right side
   465,085.42x = 165,830,780,055.81
5. Step 5: Solve for x
   x = 165,830,780,055.81/465,085.42
6. Step 6: Final answer
   x = 356,559.84