Finding the Fourth Proportional to 2,155,828.10, 3,233,190.57 and 639,156.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155,828.10 : 3,233,190.57 = 639,156.38 : x
2. Step 2: Convert to fraction form
   2,155,828.10/3,233,190.57 = 639,156.38/x
3. Step 3: Cross multiply
   2,155,828.10x = 3,233,190.57 × 639,156.38
4. Step 4: Simplify right side
   2,155,828.10x = 2,066,514,380,571.34
5. Step 5: Solve for x
   x = 2,066,514,380,571.34/2,155,828.10
6. Step 6: Final answer
   x = 958,571.04