Finding the Fourth Proportional to 3,990,709.37, 5,507,178.72 and 2,155,167.48

Step by Step Solution

1. Step 1: Write the proportion equation
   3,990,709.37 : 5,507,178.72 = 2,155,167.48 : x
2. Step 2: Convert to fraction form
   3,990,709.37/5,507,178.72 = 2,155,167.48/x
3. Step 3: Cross multiply
   3,990,709.37x = 5,507,178.72 × 2,155,167.48
4. Step 4: Simplify right side
   3,990,709.37x = 11,868,892,483,892.03
5. Step 5: Solve for x
   x = 11,868,892,483,892.03/3,990,709.37
6. Step 6: Final answer
   x = 2,974,131.01