Finding the Fourth Proportional to 872,436.27, 1,309,036.73 and 423,501.87

Step by Step Solution

1. Step 1: Write the proportion equation
   872,436.27 : 1,309,036.73 = 423,501.87 : x
2. Step 2: Convert to fraction form
   872,436.27/1,309,036.73 = 423,501.87/x
3. Step 3: Cross multiply
   872,436.27x = 1,309,036.73 × 423,501.87
4. Step 4: Simplify right side
   872,436.27x = 554,379,500,936.18
5. Step 5: Solve for x
   x = 554,379,500,936.18/872,436.27
6. Step 6: Final answer
   x = 635,438.39