Finding the Fourth Proportional to 1,436.39, 2,152.55 and 654.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.39 : 2,152.55 = 654.47 : x
2. Step 2: Convert to fraction form
   1,436.39/2,152.55 = 654.47/x
3. Step 3: Cross multiply
   1,436.39x = 2,152.55 × 654.47
4. Step 4: Simplify right side
   1,436.39x = 1,408,770.27
5. Step 5: Solve for x
   x = 1,408,770.27/1,436.39
6. Step 6: Final answer
   x = 980.77