Finding the Fourth Proportional to 805,426.86, 1,111,517.62 and 442,878.32

Step by Step Solution

1. Step 1: Write the proportion equation
   805,426.86 : 1,111,517.62 = 442,878.32 : x
2. Step 2: Convert to fraction form
   805,426.86/1,111,517.62 = 442,878.32/x
3. Step 3: Cross multiply
   805,426.86x = 1,111,517.62 × 442,878.32
4. Step 4: Simplify right side
   805,426.86x = 492,267,056,196.00
5. Step 5: Solve for x
   x = 492,267,056,196.00/805,426.86
6. Step 6: Final answer
   x = 611,187.78