Finding the Fourth Proportional to 2,238,105, 3,357,157.56 and 640,673.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,238,105 : 3,357,157.56 = 640,673.76 : x
2. Step 2: Convert to fraction form
   2,238,105/3,357,157.56 = 640,673.76/x
3. Step 3: Cross multiply
   2,238,105x = 3,357,157.56 × 640,673.76
4. Step 4: Simplify right side
   2,238,105x = 2,150,842,756,877.63
5. Step 5: Solve for x
   x = 2,150,842,756,877.63/2,238,105
6. Step 6: Final answer
   x = 961,010.66