Finding the Fourth Proportional to 2,647.16, 3,972.54 and 1,187.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,647.16 : 3,972.54 = 1,187.94 : x
2. Step 2: Convert to fraction form
   2,647.16/3,972.54 = 1,187.94/x
3. Step 3: Cross multiply
   2,647.16x = 3,972.54 × 1,187.94
4. Step 4: Simplify right side
   2,647.16x = 4,719,139.17
5. Step 5: Solve for x
   x = 4,719,139.17/2,647.16
6. Step 6: Final answer
   x = 1,782.72