Finding the Fourth Proportional to 1,244,131.39, 1,865,085.76 and 485,796.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,244,131.39 : 1,865,085.76 = 485,796.43 : x
2. Step 2: Convert to fraction form
   1,244,131.39/1,865,085.76 = 485,796.43/x
3. Step 3: Cross multiply
   1,244,131.39x = 1,865,085.76 × 485,796.43
4. Step 4: Simplify right side
   1,244,131.39x = 906,052,003,851.84
5. Step 5: Solve for x
   x = 906,052,003,851.84/1,244,131.39
6. Step 6: Final answer
   x = 728,260.71