Finding the Fourth Proportional to 2,100.48, 2,897.28 and 1,272.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.48 : 2,897.28 = 1,272.96 : x
2. Step 2: Convert to fraction form
   2,100.48/2,897.28 = 1,272.96/x
3. Step 3: Cross multiply
   2,100.48x = 2,897.28 × 1,272.96
4. Step 4: Simplify right side
   2,100.48x = 3,688,121.55
5. Step 5: Solve for x
   x = 3,688,121.55/2,100.48
6. Step 6: Final answer
   x = 1,755.85