Finding the Fourth Proportional to 478,568.61, 718,016.18 and 300,867.57

Step by Step Solution

1. Step 1: Write the proportion equation
   478,568.61 : 718,016.18 = 300,867.57 : x
2. Step 2: Convert to fraction form
   478,568.61/718,016.18 = 300,867.57/x
3. Step 3: Cross multiply
   478,568.61x = 718,016.18 × 300,867.57
4. Step 4: Simplify right side
   478,568.61x = 216,027,781,792.95
5. Step 5: Solve for x
   x = 216,027,781,792.95/478,568.61
6. Step 6: Final answer
   x = 451,403.99