Finding the Fourth Proportional to 1,134,557.10, 1,565,413.83 and 644,417.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,134,557.10 : 1,565,413.83 = 644,417.55 : x
2. Step 2: Convert to fraction form
   1,134,557.10/1,565,413.83 = 644,417.55/x
3. Step 3: Cross multiply
   1,134,557.10x = 1,565,413.83 × 644,417.55
4. Step 4: Simplify right side
   1,134,557.10x = 1,008,780,145,064.72
5. Step 5: Solve for x
   x = 1,008,780,145,064.72/1,134,557.10
6. Step 6: Final answer
   x = 889,140.04