Finding the Fourth Proportional to 1,111.98, 1,536.11 and 1,012.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.98 : 1,536.11 = 1,012.23 : x
2. Step 2: Convert to fraction form
   1,111.98/1,536.11 = 1,012.23/x
3. Step 3: Cross multiply
   1,111.98x = 1,536.11 × 1,012.23
4. Step 4: Simplify right side
   1,111.98x = 1,554,891.56
5. Step 5: Solve for x
   x = 1,554,891.56/1,111.98
6. Step 6: Final answer
   x = 1,398.31