Finding the Fourth Proportional to 1,932.67, 2,667.72 and 1,187.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,932.67 : 2,667.72 = 1,187.25 : x
2. Step 2: Convert to fraction form
   1,932.67/2,667.72 = 1,187.25/x
3. Step 3: Cross multiply
   1,932.67x = 2,667.72 × 1,187.25
4. Step 4: Simplify right side
   1,932.67x = 3,167,250.57
5. Step 5: Solve for x
   x = 3,167,250.57/1,932.67
6. Step 6: Final answer
   x = 1,638.80