Finding the Fourth Proportional to 1,536.72, 2,120.76 and 1,012.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,536.72 : 2,120.76 = 1,012.38 : x
2. Step 2: Convert to fraction form
   1,536.72/2,120.76 = 1,012.38/x
3. Step 3: Cross multiply
   1,536.72x = 2,120.76 × 1,012.38
4. Step 4: Simplify right side
   1,536.72x = 2,147,015.01
5. Step 5: Solve for x
   x = 2,147,015.01/1,536.72
6. Step 6: Final answer
   x = 1,397.14