Finding the Fourth Proportional to 2,436.64, 3,656.40 and 898.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,436.64 : 3,656.40 = 898.72 : x
2. Step 2: Convert to fraction form
   2,436.64/3,656.40 = 898.72/x
3. Step 3: Cross multiply
   2,436.64x = 3,656.40 × 898.72
4. Step 4: Simplify right side
   2,436.64x = 3,286,079.81
5. Step 5: Solve for x
   x = 3,286,079.81/2,436.64
6. Step 6: Final answer
   x = 1,348.61