Finding the Fourth Proportional to 1,711.08, 2,567.34 and 786.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,711.08 : 2,567.34 = 786.72 : x
2. Step 2: Convert to fraction form
   1,711.08/2,567.34 = 786.72/x
3. Step 3: Cross multiply
   1,711.08x = 2,567.34 × 786.72
4. Step 4: Simplify right side
   1,711.08x = 2,019,777.72
5. Step 5: Solve for x
   x = 2,019,777.72/1,711.08
6. Step 6: Final answer
   x = 1,180.41