Finding the Fourth Proportional to 478,456.41, 660,262.10 and 260,667.68

Step by Step Solution

1. Step 1: Write the proportion equation
   478,456.41 : 660,262.10 = 260,667.68 : x
2. Step 2: Convert to fraction form
   478,456.41/660,262.10 = 260,667.68/x
3. Step 3: Cross multiply
   478,456.41x = 660,262.10 × 260,667.68
4. Step 4: Simplify right side
   478,456.41x = 172,108,990,146.25
5. Step 5: Solve for x
   x = 172,108,990,146.25/478,456.41
6. Step 6: Final answer
   x = 359,717.18