Finding the Fourth Proportional to 846,478.89, 1,269,792.18 and 277,689.60

Step by Step Solution

1. Step 1: Write the proportion equation
   846,478.89 : 1,269,792.18 = 277,689.60 : x
2. Step 2: Convert to fraction form
   846,478.89/1,269,792.18 = 277,689.60/x
3. Step 3: Cross multiply
   846,478.89x = 1,269,792.18 × 277,689.60
4. Step 4: Simplify right side
   846,478.89x = 352,608,082,547.33
5. Step 5: Solve for x
   x = 352,608,082,547.33/846,478.89
6. Step 6: Final answer
   x = 416,558.63