Finding the Fourth Proportional to 2,058,724.98, 3,087,939.15 and 638,744.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,058,724.98 : 3,087,939.15 = 638,744.50 : x
2. Step 2: Convert to fraction form
   2,058,724.98/3,087,939.15 = 638,744.50/x
3. Step 3: Cross multiply
   2,058,724.98x = 3,087,939.15 × 638,744.50
4. Step 4: Simplify right side
   2,058,724.98x = 1,972,404,148,397.18
5. Step 5: Solve for x
   x = 1,972,404,148,397.18/2,058,724.98
6. Step 6: Final answer
   x = 958,070.73