Finding the Fourth Proportional to 1,200,413.94, 1,656,547.89 and 656,548.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200,413.94 : 1,656,547.89 = 656,548.05 : x
2. Step 2: Convert to fraction form
   1,200,413.94/1,656,547.89 = 656,548.05/x
3. Step 3: Cross multiply
   1,200,413.94x = 1,656,547.89 × 656,548.05
4. Step 4: Simplify right side
   1,200,413.94x = 1,087,603,286,911.11
5. Step 5: Solve for x
   x = 1,087,603,286,911.11/1,200,413.94
6. Step 6: Final answer
   x = 906,023.54