Finding the Fourth Proportional to 1,396.89, 2,091.98 and 847.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,396.89 : 2,091.98 = 847.71 : x
2. Step 2: Convert to fraction form
   1,396.89/2,091.98 = 847.71/x
3. Step 3: Cross multiply
   1,396.89x = 2,091.98 × 847.71
4. Step 4: Simplify right side
   1,396.89x = 1,773,388.13
5. Step 5: Solve for x
   x = 1,773,388.13/1,396.89
6. Step 6: Final answer
   x = 1,269.53