Finding the Fourth Proportional to 1,525.90, 2,105.78 and 862.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,525.90 : 2,105.78 = 862.72 : x
2. Step 2: Convert to fraction form
   1,525.90/2,105.78 = 862.72/x
3. Step 3: Cross multiply
   1,525.90x = 2,105.78 × 862.72
4. Step 4: Simplify right side
   1,525.90x = 1,816,698.52
5. Step 5: Solve for x
   x = 1,816,698.52/1,525.90
6. Step 6: Final answer
   x = 1,190.58