Finding the Fourth Proportional to 1,870.77, 2,804.31 and 775.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.77 : 2,804.31 = 775.76 : x
2. Step 2: Convert to fraction form
   1,870.77/2,804.31 = 775.76/x
3. Step 3: Cross multiply
   1,870.77x = 2,804.31 × 775.76
4. Step 4: Simplify right side
   1,870.77x = 2,175,457.50
5. Step 5: Solve for x
   x = 2,175,457.50/1,870.77
6. Step 6: Final answer
   x = 1,162.87