Finding the Fourth Proportional to 1,095.26, 1,641.03 and 661.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,095.26 : 1,641.03 = 661.50 : x
2. Step 2: Convert to fraction form
   1,095.26/1,641.03 = 661.50/x
3. Step 3: Cross multiply
   1,095.26x = 1,641.03 × 661.50
4. Step 4: Simplify right side
   1,095.26x = 1,085,538.86
5. Step 5: Solve for x
   x = 1,085,538.86/1,095.26
6. Step 6: Final answer
   x = 991.13