Finding the Fourth Proportional to 2,667,388.40, 3,998,147.16 and 1,317,552.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,667,388.40 : 3,998,147.16 = 1,317,552.56 : x
2. Step 2: Convert to fraction form
   2,667,388.40/3,998,147.16 = 1,317,552.56/x
3. Step 3: Cross multiply
   2,667,388.40x = 3,998,147.16 × 1,317,552.56
4. Step 4: Simplify right side
   2,667,388.40x = 5,267,769,025,914.73
5. Step 5: Solve for x
   x = 5,267,769,025,914.73/2,667,388.40
6. Step 6: Final answer
   x = 1,974,878.88