Finding the Fourth Proportional to 2,662,422.99, 3,993,634.34 and 640,667.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,662,422.99 : 3,993,634.34 = 640,667.10 : x
2. Step 2: Convert to fraction form
   2,662,422.99/3,993,634.34 = 640,667.10/x
3. Step 3: Cross multiply
   2,662,422.99x = 3,993,634.34 × 640,667.10
4. Step 4: Simplify right side
   2,662,422.99x = 2,558,590,145,243.51
5. Step 5: Solve for x
   x = 2,558,590,145,243.51/2,662,422.99
6. Step 6: Final answer
   x = 961,000.62