Finding the Fourth Proportional to 718,111.88, 990,982.54 and 395,851.96

Step by Step Solution

1. Step 1: Write the proportion equation
   718,111.88 : 990,982.54 = 395,851.96 : x
2. Step 2: Convert to fraction form
   718,111.88/990,982.54 = 395,851.96/x
3. Step 3: Cross multiply
   718,111.88x = 990,982.54 × 395,851.96
4. Step 4: Simplify right side
   718,111.88x = 392,282,380,784.78
5. Step 5: Solve for x
   x = 392,282,380,784.78/718,111.88
6. Step 6: Final answer
   x = 546,269.17