Finding the Fourth Proportional to 1,525.31, 2,105.04 and 853.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,525.31 : 2,105.04 = 853.17 : x
2. Step 2: Convert to fraction form
   1,525.31/2,105.04 = 853.17/x
3. Step 3: Cross multiply
   1,525.31x = 2,105.04 × 853.17
4. Step 4: Simplify right side
   1,525.31x = 1,795,956.98
5. Step 5: Solve for x
   x = 1,795,956.98/1,525.31
6. Step 6: Final answer
   x = 1,177.44