Finding the Fourth Proportional to 1,870.40, 2,804.48 and 774.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.40 : 2,804.48 = 774.12 : x
2. Step 2: Convert to fraction form
   1,870.40/2,804.48 = 774.12/x
3. Step 3: Cross multiply
   1,870.40x = 2,804.48 × 774.12
4. Step 4: Simplify right side
   1,870.40x = 2,171,004.06
5. Step 5: Solve for x
   x = 2,171,004.06/1,870.40
6. Step 6: Final answer
   x = 1,160.72