Finding the Fourth Proportional to 1,113.56, 1,536.90 and 648.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,113.56 : 1,536.90 = 648.08 : x
2. Step 2: Convert to fraction form
   1,113.56/1,536.90 = 648.08/x
3. Step 3: Cross multiply
   1,113.56x = 1,536.90 × 648.08
4. Step 4: Simplify right side
   1,113.56x = 996,034.15
5. Step 5: Solve for x
   x = 996,034.15/1,113.56
6. Step 6: Final answer
   x = 894.46