Finding the Fourth Proportional to 1,536.94, 2,121.01 and 838.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,536.94 : 2,121.01 = 838.31 : x
2. Step 2: Convert to fraction form
   1,536.94/2,121.01 = 838.31/x
3. Step 3: Cross multiply
   1,536.94x = 2,121.01 × 838.31
4. Step 4: Simplify right side
   1,536.94x = 1,778,067.10
5. Step 5: Solve for x
   x = 1,778,067.10/1,536.94
6. Step 6: Final answer
   x = 1,156.89