Finding the Fourth Proportional to 2,073.60, 3,114.72 and 1,643.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,073.60 : 3,114.72 = 1,643.76 : x
2. Step 2: Convert to fraction form
   2,073.60/3,114.72 = 1,643.76/x
3. Step 3: Cross multiply
   2,073.60x = 3,114.72 × 1,643.76
4. Step 4: Simplify right side
   2,073.60x = 5,119,852.15
5. Step 5: Solve for x
   x = 5,119,852.15/2,073.60
6. Step 6: Final answer
   x = 2,469.06