Finding the Fourth Proportional to 2,436.72, 3,656.96 and 976.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,436.72 : 3,656.96 = 976.80 : x
2. Step 2: Convert to fraction form
   2,436.72/3,656.96 = 976.80/x
3. Step 3: Cross multiply
   2,436.72x = 3,656.96 × 976.80
4. Step 4: Simplify right side
   2,436.72x = 3,572,118.53
5. Step 5: Solve for x
   x = 3,572,118.53/2,436.72
6. Step 6: Final answer
   x = 1,465.95