Finding the Fourth Proportional to 1,111.50, 1,668.51 and 649.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.50 : 1,668.51 = 649.62 : x
2. Step 2: Convert to fraction form
   1,111.50/1,668.51 = 649.62/x
3. Step 3: Cross multiply
   1,111.50x = 1,668.51 × 649.62
4. Step 4: Simplify right side
   1,111.50x = 1,083,897.47
5. Step 5: Solve for x
   x = 1,083,897.47/1,111.50
6. Step 6: Final answer
   x = 975.17