Finding the Fourth Proportional to 778,456.86, 1,074,878.55 and 609,173.34

Step by Step Solution

1. Step 1: Write the proportion equation
   778,456.86 : 1,074,878.55 = 609,173.34 : x
2. Step 2: Convert to fraction form
   778,456.86/1,074,878.55 = 609,173.34/x
3. Step 3: Cross multiply
   778,456.86x = 1,074,878.55 × 609,173.34
4. Step 4: Simplify right side
   778,456.86x = 654,787,356,397.86
5. Step 5: Solve for x
   x = 654,787,356,397.86/778,456.86
6. Step 6: Final answer
   x = 841,135.06