Finding the Fourth Proportional to 1,686.72, 2,525.16 and 1,191

Step by Step Solution

1. Step 1: Write the proportion equation
   1,686.72 : 2,525.16 = 1,191 : x
2. Step 2: Convert to fraction form
   1,686.72/2,525.16 = 1,191/x
3. Step 3: Cross multiply
   1,686.72x = 2,525.16 × 1,191
4. Step 4: Simplify right side
   1,686.72x = 3,007,465.56
5. Step 5: Solve for x
   x = 3,007,465.56/1,686.72
6. Step 6: Final answer
   x = 1,783.03