Finding the Fourth Proportional to 2,155,827.60, 3,233,189.82 and 639,155.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155,827.60 : 3,233,189.82 = 639,155.88 : x
2. Step 2: Convert to fraction form
   2,155,827.60/3,233,189.82 = 639,155.88/x
3. Step 3: Cross multiply
   2,155,827.60x = 3,233,189.82 × 639,155.88
4. Step 4: Simplify right side
   2,155,827.60x = 2,066,512,284,609.14
5. Step 5: Solve for x
   x = 2,066,512,284,609.14/2,155,827.60
6. Step 6: Final answer
   x = 958,570.29