Finding the Fourth Proportional to 1,870.41, 2,806.35 and 774.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.41 : 2,806.35 = 774.51 : x
2. Step 2: Convert to fraction form
   1,870.41/2,806.35 = 774.51/x
3. Step 3: Cross multiply
   1,870.41x = 2,806.35 × 774.51
4. Step 4: Simplify right side
   1,870.41x = 2,173,546.14
5. Step 5: Solve for x
   x = 2,173,546.14/1,870.41
6. Step 6: Final answer
   x = 1,162.07