Finding the Fourth Proportional to 2,650.72, 3,973.63 and 918.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,650.72 : 3,973.63 = 918.13 : x
2. Step 2: Convert to fraction form
   2,650.72/3,973.63 = 918.13/x
3. Step 3: Cross multiply
   2,650.72x = 3,973.63 × 918.13
4. Step 4: Simplify right side
   2,650.72x = 3,648,308.91
5. Step 5: Solve for x
   x = 3,648,308.91/2,650.72
6. Step 6: Final answer
   x = 1,376.35