Finding the Fourth Proportional to 3,123.35, 4,687.35 and 1,275.74

Step by Step Solution

1. Step 1: Write the proportion equation
   3,123.35 : 4,687.35 = 1,275.74 : x
2. Step 2: Convert to fraction form
   3,123.35/4,687.35 = 1,275.74/x
3. Step 3: Cross multiply
   3,123.35x = 4,687.35 × 1,275.74
4. Step 4: Simplify right side
   3,123.35x = 5,979,816.45
5. Step 5: Solve for x
   x = 5,979,816.45/3,123.35
6. Step 6: Final answer
   x = 1,914.56