Finding the Fourth Proportional to 2,110.65, 2,912.72 and 1,272.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,110.65 : 2,912.72 = 1,272.23 : x
2. Step 2: Convert to fraction form
   2,110.65/2,912.72 = 1,272.23/x
3. Step 3: Cross multiply
   2,110.65x = 2,912.72 × 1,272.23
4. Step 4: Simplify right side
   2,110.65x = 3,705,649.77
5. Step 5: Solve for x
   x = 3,705,649.77/2,110.65
6. Step 6: Final answer
   x = 1,755.69