Finding the Fourth Proportional to 1,620.45, 2,420.33 and 1,294.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,620.45 : 2,420.33 = 1,294.83 : x
2. Step 2: Convert to fraction form
   1,620.45/2,420.33 = 1,294.83/x
3. Step 3: Cross multiply
   1,620.45x = 2,420.33 × 1,294.83
4. Step 4: Simplify right side
   1,620.45x = 3,133,909.42
5. Step 5: Solve for x
   x = 3,133,909.42/1,620.45
6. Step 6: Final answer
   x = 1,933.97