Finding the Fourth Proportional to 777,644, 1,073,148.72 and 419,948

Step by Step Solution

1. Step 1: Write the proportion equation
   777,644 : 1,073,148.72 = 419,948 : x
2. Step 2: Convert to fraction form
   777,644/1,073,148.72 = 419,948/x
3. Step 3: Cross multiply
   777,644x = 1,073,148.72 × 419,948
4. Step 4: Simplify right side
   777,644x = 450,666,658,666.56
5. Step 5: Solve for x
   x = 450,666,658,666.56/777,644
6. Step 6: Final answer
   x = 579,528.24