Finding the Fourth Proportional to 1,896.79, 2,616.72 and 1,188.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,896.79 : 2,616.72 = 1,188.34 : x
2. Step 2: Convert to fraction form
   1,896.79/2,616.72 = 1,188.34/x
3. Step 3: Cross multiply
   1,896.79x = 2,616.72 × 1,188.34
4. Step 4: Simplify right side
   1,896.79x = 3,109,553.04
5. Step 5: Solve for x
   x = 3,109,553.04/1,896.79
6. Step 6: Final answer
   x = 1,639.38