Finding the Fourth Proportional to 2,155,758.06, 3,233,085.33 and 639,086.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155,758.06 : 3,233,085.33 = 639,086.31 : x
2. Step 2: Convert to fraction form
   2,155,758.06/3,233,085.33 = 639,086.31/x
3. Step 3: Cross multiply
   2,155,758.06x = 3,233,085.33 × 639,086.31
4. Step 4: Simplify right side
   2,155,758.06x = 2,066,220,573,464.83
5. Step 5: Solve for x
   x = 2,066,220,573,464.83/2,155,758.06
6. Step 6: Final answer
   x = 958,465.89