Finding the Fourth Proportional to 2,667,721.20, 3,998,860.20 and 1,317,807.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,667,721.20 : 3,998,860.20 = 1,317,807.60 : x
2. Step 2: Convert to fraction form
   2,667,721.20/3,998,860.20 = 1,317,807.60/x
3. Step 3: Cross multiply
   2,667,721.20x = 3,998,860.20 × 1,317,807.60
4. Step 4: Simplify right side
   2,667,721.20x = 5,269,728,362,897.52
5. Step 5: Solve for x
   x = 5,269,728,362,897.52/2,667,721.20
6. Step 6: Final answer
   x = 1,975,366.98