Finding the Fourth Proportional to 3,974,857.31, 5,485,303.40 and 2,164,021.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,974,857.31 : 5,485,303.40 = 2,164,021.31 : x
2. Step 2: Convert to fraction form
   3,974,857.31/5,485,303.40 = 2,164,021.31/x
3. Step 3: Cross multiply
   3,974,857.31x = 5,485,303.40 × 2,164,021.31
4. Step 4: Simplify right side
   3,974,857.31x = 11,870,313,452,308.61
5. Step 5: Solve for x
   x = 11,870,313,452,308.61/3,974,857.31
6. Step 6: Final answer
   x = 2,986,349.58