Finding the Fourth Proportional to 1,258,902.72, 1,737,263.88 and 685,947.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,258,902.72 : 1,737,263.88 = 685,947.60 : x
2. Step 2: Convert to fraction form
   1,258,902.72/1,737,263.88 = 685,947.60/x
3. Step 3: Cross multiply
   1,258,902.72x = 1,737,263.88 × 685,947.60
4. Step 4: Simplify right side
   1,258,902.72x = 1,191,671,989,052.69
5. Step 5: Solve for x
   x = 1,191,671,989,052.69/1,258,902.72
6. Step 6: Final answer
   x = 946,595.77