Finding the Fourth Proportional to 1,089.48, 1,503.41 and 647.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,089.48 : 1,503.41 = 647.37 : x
2. Step 2: Convert to fraction form
   1,089.48/1,503.41 = 647.37/x
3. Step 3: Cross multiply
   1,089.48x = 1,503.41 × 647.37
4. Step 4: Simplify right side
   1,089.48x = 973,258.71
5. Step 5: Solve for x
   x = 973,258.71/1,089.48
6. Step 6: Final answer
   x = 893.33