Finding the Fourth Proportional to 1,551.89, 2,141.61 and 853.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,551.89 : 2,141.61 = 853.26 : x
2. Step 2: Convert to fraction form
   1,551.89/2,141.61 = 853.26/x
3. Step 3: Cross multiply
   1,551.89x = 2,141.61 × 853.26
4. Step 4: Simplify right side
   1,551.89x = 1,827,350.15
5. Step 5: Solve for x
   x = 1,827,350.15/1,551.89
6. Step 6: Final answer
   x = 1,177.50