Finding the Fourth Proportional to 1,230.64, 1,842.56 and 940.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,230.64 : 1,842.56 = 940.72 : x
2. Step 2: Convert to fraction form
   1,230.64/1,842.56 = 940.72/x
3. Step 3: Cross multiply
   1,230.64x = 1,842.56 × 940.72
4. Step 4: Simplify right side
   1,230.64x = 1,733,333.04
5. Step 5: Solve for x
   x = 1,733,333.04/1,230.64
6. Step 6: Final answer
   x = 1,408.48