Finding the Fourth Proportional to 1,188.67, 1,640.25 and 1,100.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,188.67 : 1,640.25 = 1,100.51 : x
2. Step 2: Convert to fraction form
   1,188.67/1,640.25 = 1,100.51/x
3. Step 3: Cross multiply
   1,188.67x = 1,640.25 × 1,100.51
4. Step 4: Simplify right side
   1,188.67x = 1,805,103.71
5. Step 5: Solve for x
   x = 1,805,103.71/1,188.67
6. Step 6: Final answer
   x = 1,518.59