Finding the Fourth Proportional to 1,895.81, 2,616.91 and 1,188.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,895.81 : 2,616.91 = 1,188.45 : x
2. Step 2: Convert to fraction form
   1,895.81/2,616.91 = 1,188.45/x
3. Step 3: Cross multiply
   1,895.81x = 2,616.91 × 1,188.45
4. Step 4: Simplify right side
   1,895.81x = 3,110,066.69
5. Step 5: Solve for x
   x = 3,110,066.69/1,895.81
6. Step 6: Final answer
   x = 1,640.49