Finding the Fourth Proportional to 704,540.50, 1,057,005.15 and 205,904.50

Step by Step Solution

1. Step 1: Write the proportion equation
   704,540.50 : 1,057,005.15 = 205,904.50 : x
2. Step 2: Convert to fraction form
   704,540.50/1,057,005.15 = 205,904.50/x
3. Step 3: Cross multiply
   704,540.50x = 1,057,005.15 × 205,904.50
4. Step 4: Simplify right side
   704,540.50x = 217,642,116,908.18
5. Step 5: Solve for x
   x = 217,642,116,908.18/704,540.50
6. Step 6: Final answer
   x = 308,913.56