Finding the Fourth Proportional to 2,155,836.60, 3,233,203.32 and 639,164.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155,836.60 : 3,233,203.32 = 639,164.88 : x
2. Step 2: Convert to fraction form
   2,155,836.60/3,233,203.32 = 639,164.88/x
3. Step 3: Cross multiply
   2,155,836.60x = 3,233,203.32 × 639,164.88
4. Step 4: Simplify right side
   2,155,836.60x = 2,066,550,012,043.40
5. Step 5: Solve for x
   x = 2,066,550,012,043.40/2,155,836.60
6. Step 6: Final answer
   x = 958,583.79