Finding the Fourth Proportional to 1,770.81, 2,443.98 and 1,275.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,770.81 : 2,443.98 = 1,275.09 : x
2. Step 2: Convert to fraction form
   1,770.81/2,443.98 = 1,275.09/x
3. Step 3: Cross multiply
   1,770.81x = 2,443.98 × 1,275.09
4. Step 4: Simplify right side
   1,770.81x = 3,116,294.46
5. Step 5: Solve for x
   x = 3,116,294.46/1,770.81
6. Step 6: Final answer
   x = 1,759.81