Finding the Fourth Proportional to 1,525.58, 2,105.20 and 862.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,525.58 : 2,105.20 = 862.50 : x
2. Step 2: Convert to fraction form
   1,525.58/2,105.20 = 862.50/x
3. Step 3: Cross multiply
   1,525.58x = 2,105.20 × 862.50
4. Step 4: Simplify right side
   1,525.58x = 1,815,735.00
5. Step 5: Solve for x
   x = 1,815,735.00/1,525.58
6. Step 6: Final answer
   x = 1,190.19