Finding the Fourth Proportional to 1,113.57, 1,536.51 and 671.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,113.57 : 1,536.51 = 671.51 : x
2. Step 2: Convert to fraction form
   1,113.57/1,536.51 = 671.51/x
3. Step 3: Cross multiply
   1,113.57x = 1,536.51 × 671.51
4. Step 4: Simplify right side
   1,113.57x = 1,031,774.15
5. Step 5: Solve for x
   x = 1,031,774.15/1,113.57
6. Step 6: Final answer
   x = 926.55