Finding the Fourth Proportional to 680,967.50, 939,665.62 and 419,281.25

Step by Step Solution

1. Step 1: Write the proportion equation
   680,967.50 : 939,665.62 = 419,281.25 : x
2. Step 2: Convert to fraction form
   680,967.50/939,665.62 = 419,281.25/x
3. Step 3: Cross multiply
   680,967.50x = 939,665.62 × 419,281.25
4. Step 4: Simplify right side
   680,967.50x = 393,984,173,315.42
5. Step 5: Solve for x
   x = 393,984,173,315.42/680,967.50
6. Step 6: Final answer
   x = 578,565.31