Finding the Fourth Proportional to 2,102.78, 2,901.98 and 1,263.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,102.78 : 2,901.98 = 1,263.47 : x
2. Step 2: Convert to fraction form
   2,102.78/2,901.98 = 1,263.47/x
3. Step 3: Cross multiply
   2,102.78x = 2,901.98 × 1,263.47
4. Step 4: Simplify right side
   2,102.78x = 3,666,546.21
5. Step 5: Solve for x
   x = 3,666,546.21/2,102.78
6. Step 6: Final answer
   x = 1,743.67