Finding the Fourth Proportional to 465,100.74, 641,870.73 and 258,393.35

Step by Step Solution

1. Step 1: Write the proportion equation
   465,100.74 : 641,870.73 = 258,393.35 : x
2. Step 2: Convert to fraction form
   465,100.74/641,870.73 = 258,393.35/x
3. Step 3: Cross multiply
   465,100.74x = 641,870.73 × 258,393.35
4. Step 4: Simplify right side
   465,100.74x = 165,855,129,796.32
5. Step 5: Solve for x
   x = 165,855,129,796.32/465,100.74
6. Step 6: Final answer
   x = 356,600.44