Finding the Fourth Proportional to 1,500, 2,070.24 and 1,086.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,500 : 2,070.24 = 1,086.72 : x
2. Step 2: Convert to fraction form
   1,500/2,070.24 = 1,086.72/x
3. Step 3: Cross multiply
   1,500x = 2,070.24 × 1,086.72
4. Step 4: Simplify right side
   1,500x = 2,249,771.21
5. Step 5: Solve for x
   x = 2,249,771.21/1,500
6. Step 6: Final answer
   x = 1,499.85