Finding the Fourth Proportional to 1,611.89, 2,414.50 and 776.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,611.89 : 2,414.50 = 776.47 : x
2. Step 2: Convert to fraction form
   1,611.89/2,414.50 = 776.47/x
3. Step 3: Cross multiply
   1,611.89x = 2,414.50 × 776.47
4. Step 4: Simplify right side
   1,611.89x = 1,874,786.82
5. Step 5: Solve for x
   x = 1,874,786.82/1,611.89
6. Step 6: Final answer
   x = 1,163.10