Finding the Fourth Proportional to 789,219.31, 1,089,418.82 and 517,304.72

Step by Step Solution

1. Step 1: Write the proportion equation
   789,219.31 : 1,089,418.82 = 517,304.72 : x
2. Step 2: Convert to fraction form
   789,219.31/1,089,418.82 = 517,304.72/x
3. Step 3: Cross multiply
   789,219.31x = 1,089,418.82 × 517,304.72
4. Step 4: Simplify right side
   789,219.31x = 563,561,489,609.21
5. Step 5: Solve for x
   x = 563,561,489,609.21/789,219.31
6. Step 6: Final answer
   x = 714,074.64