Finding the Fourth Proportional to 1,117.69, 1,543.32 and 803.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,117.69 : 1,543.32 = 803.61 : x
2. Step 2: Convert to fraction form
   1,117.69/1,543.32 = 803.61/x
3. Step 3: Cross multiply
   1,117.69x = 1,543.32 × 803.61
4. Step 4: Simplify right side
   1,117.69x = 1,240,227.39
5. Step 5: Solve for x
   x = 1,240,227.39/1,117.69
6. Step 6: Final answer
   x = 1,109.64