Finding the Fourth Proportional to 2,221.60, 3,064.72 and 1,436.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,221.60 : 3,064.72 = 1,436.32 : x
2. Step 2: Convert to fraction form
   2,221.60/3,064.72 = 1,436.32/x
3. Step 3: Cross multiply
   2,221.60x = 3,064.72 × 1,436.32
4. Step 4: Simplify right side
   2,221.60x = 4,401,918.63
5. Step 5: Solve for x
   x = 4,401,918.63/2,221.60
6. Step 6: Final answer
   x = 1,981.42