Finding the Fourth Proportional to 2,123.63, 3,177.55 and 1,276.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.63 : 3,177.55 = 1,276.34 : x
2. Step 2: Convert to fraction form
   2,123.63/3,177.55 = 1,276.34/x
3. Step 3: Cross multiply
   2,123.63x = 3,177.55 × 1,276.34
4. Step 4: Simplify right side
   2,123.63x = 4,055,654.74
5. Step 5: Solve for x
   x = 4,055,654.74/2,123.63
6. Step 6: Final answer
   x = 1,909.77