Finding the Fourth Proportional to 1,374.29, 1,896.69 and 776.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,374.29 : 1,896.69 = 776.81 : x
2. Step 2: Convert to fraction form
   1,374.29/1,896.69 = 776.81/x
3. Step 3: Cross multiply
   1,374.29x = 1,896.69 × 776.81
4. Step 4: Simplify right side
   1,374.29x = 1,473,367.76
5. Step 5: Solve for x
   x = 1,473,367.76/1,374.29
6. Step 6: Final answer
   x = 1,072.09