Finding the Fourth Proportional to 1,643.12, 2,267.32 and 944.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,643.12 : 2,267.32 = 944.72 : x
2. Step 2: Convert to fraction form
   1,643.12/2,267.32 = 944.72/x
3. Step 3: Cross multiply
   1,643.12x = 2,267.32 × 944.72
4. Step 4: Simplify right side
   1,643.12x = 2,141,982.55
5. Step 5: Solve for x
   x = 2,141,982.55/1,643.12
6. Step 6: Final answer
   x = 1,303.61