Finding the Fourth Proportional to 1,776.42, 2,661.75 and 1,313.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,776.42 : 2,661.75 = 1,313.55 : x
2. Step 2: Convert to fraction form
   1,776.42/2,661.75 = 1,313.55/x
3. Step 3: Cross multiply
   1,776.42x = 2,661.75 × 1,313.55
4. Step 4: Simplify right side
   1,776.42x = 3,496,341.71
5. Step 5: Solve for x
   x = 3,496,341.71/1,776.42
6. Step 6: Final answer
   x = 1,968.20