Finding the Fourth Proportional to 1,119.31, 1,544.72 and 647.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,119.31 : 1,544.72 = 647.29 : x
2. Step 2: Convert to fraction form
   1,119.31/1,544.72 = 647.29/x
3. Step 3: Cross multiply
   1,119.31x = 1,544.72 × 647.29
4. Step 4: Simplify right side
   1,119.31x = 999,881.81
5. Step 5: Solve for x
   x = 999,881.81/1,119.31
6. Step 6: Final answer
   x = 893.30