Finding the Fourth Proportional to 2,407.68, 3,611.57 and 847.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,407.68 : 3,611.57 = 847.69 : x
2. Step 2: Convert to fraction form
   2,407.68/3,611.57 = 847.69/x
3. Step 3: Cross multiply
   2,407.68x = 3,611.57 × 847.69
4. Step 4: Simplify right side
   2,407.68x = 3,061,478.51
5. Step 5: Solve for x
   x = 3,061,478.51/2,407.68
6. Step 6: Final answer
   x = 1,271.55