Finding the Fourth Proportional to 1,523.90, 2,103.02 and 860.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,523.90 : 2,103.02 = 860.72 : x
2. Step 2: Convert to fraction form
   1,523.90/2,103.02 = 860.72/x
3. Step 3: Cross multiply
   1,523.90x = 2,103.02 × 860.72
4. Step 4: Simplify right side
   1,523.90x = 1,810,096.56
5. Step 5: Solve for x
   x = 1,810,096.56/1,523.90
6. Step 6: Final answer
   x = 1,187.81