Finding the Fourth Proportional to 1,105.55, 1,654.53 and 872.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.55 : 1,654.53 = 872.47 : x
2. Step 2: Convert to fraction form
   1,105.55/1,654.53 = 872.47/x
3. Step 3: Cross multiply
   1,105.55x = 1,654.53 × 872.47
4. Step 4: Simplify right side
   1,105.55x = 1,443,526.59
5. Step 5: Solve for x
   x = 1,443,526.59/1,105.55
6. Step 6: Final answer
   x = 1,305.71