Finding the Fourth Proportional to 1,628.79, 2,440.63 and 1,259.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,628.79 : 2,440.63 = 1,259.50 : x
2. Step 2: Convert to fraction form
   1,628.79/2,440.63 = 1,259.50/x
3. Step 3: Cross multiply
   1,628.79x = 2,440.63 × 1,259.50
4. Step 4: Simplify right side
   1,628.79x = 3,073,973.49
5. Step 5: Solve for x
   x = 3,073,973.49/1,628.79
6. Step 6: Final answer
   x = 1,887.27