Finding the Fourth Proportional to 518,196.68, 715,162.42 and 303,323.72

Step by Step Solution

1. Step 1: Write the proportion equation
   518,196.68 : 715,162.42 = 303,323.72 : x
2. Step 2: Convert to fraction form
   518,196.68/715,162.42 = 303,323.72/x
3. Step 3: Cross multiply
   518,196.68x = 715,162.42 × 303,323.72
4. Step 4: Simplify right side
   518,196.68x = 216,925,725,638.60
5. Step 5: Solve for x
   x = 216,925,725,638.60/518,196.68
6. Step 6: Final answer
   x = 418,616.59