Finding the Fourth Proportional to 805,499.78, 1,111,593.70 and 442,947.02

Step by Step Solution

1. Step 1: Write the proportion equation
   805,499.78 : 1,111,593.70 = 442,947.02 : x
2. Step 2: Convert to fraction form
   805,499.78/1,111,593.70 = 442,947.02/x
3. Step 3: Cross multiply
   805,499.78x = 1,111,593.70 × 442,947.02
4. Step 4: Simplify right side
   805,499.78x = 492,377,116,865.77
5. Step 5: Solve for x
   x = 492,377,116,865.77/805,499.78
6. Step 6: Final answer
   x = 611,269.09