Finding the Fourth Proportional to 899,015.98, 1,240,638.27 and 496,607.98

Step by Step Solution

1. Step 1: Write the proportion equation
   899,015.98 : 1,240,638.27 = 496,607.98 : x
2. Step 2: Convert to fraction form
   899,015.98/1,240,638.27 = 496,607.98/x
3. Step 3: Cross multiply
   899,015.98x = 1,240,638.27 × 496,607.98
4. Step 4: Simplify right side
   899,015.98x = 616,110,865,175.40
5. Step 5: Solve for x
   x = 616,110,865,175.40/899,015.98
6. Step 6: Final answer
   x = 685,316.92