Finding the Fourth Proportional to 1,258,928.29, 1,737,321.42 and 685,968.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,258,928.29 : 1,737,321.42 = 685,968.31 : x
2. Step 2: Convert to fraction form
   1,258,928.29/1,737,321.42 = 685,968.31/x
3. Step 3: Cross multiply
   1,258,928.29x = 1,737,321.42 × 685,968.31
4. Step 4: Simplify right side
   1,258,928.29x = 1,191,747,438,404.20
5. Step 5: Solve for x
   x = 1,191,747,438,404.20/1,258,928.29
6. Step 6: Final answer
   x = 946,636.47