Finding the Fourth Proportional to 945,589.99, 1,304,888.43 and 515,870.05

Step by Step Solution

1. Step 1: Write the proportion equation
   945,589.99 : 1,304,888.43 = 515,870.05 : x
2. Step 2: Convert to fraction form
   945,589.99/1,304,888.43 = 515,870.05/x
3. Step 3: Cross multiply
   945,589.99x = 1,304,888.43 × 515,870.05
4. Step 4: Simplify right side
   945,589.99x = 673,152,859,628.52
5. Step 5: Solve for x
   x = 673,152,859,628.52/945,589.99
6. Step 6: Final answer
   x = 711,886.62