Finding the Fourth Proportional to 1,258,747.05, 1,737,054.72 and 685,787.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,258,747.05 : 1,737,054.72 = 685,787.67 : x
2. Step 2: Convert to fraction form
   1,258,747.05/1,737,054.72 = 685,787.67/x
3. Step 3: Cross multiply
   1,258,747.05x = 1,737,054.72 × 685,787.67
4. Step 4: Simplify right side
   1,258,747.05x = 1,191,250,709,091.30
5. Step 5: Solve for x
   x = 1,191,250,709,091.30/1,258,747.05
6. Step 6: Final answer
   x = 946,378.15