Finding the Fourth Proportional to 1,932.88, 2,667.80 and 1,187.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,932.88 : 2,667.80 = 1,187.47 : x
2. Step 2: Convert to fraction form
   1,932.88/2,667.80 = 1,187.47/x
3. Step 3: Cross multiply
   1,932.88x = 2,667.80 × 1,187.47
4. Step 4: Simplify right side
   1,932.88x = 3,167,937.51
5. Step 5: Solve for x
   x = 3,167,937.51/1,932.88
6. Step 6: Final answer
   x = 1,638.98