Finding the Fourth Proportional to 1,620.80, 2,432.00 and 1,072.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,620.80 : 2,432.00 = 1,072.83 : x
2. Step 2: Convert to fraction form
   1,620.80/2,432.00 = 1,072.83/x
3. Step 3: Cross multiply
   1,620.80x = 2,432.00 × 1,072.83
4. Step 4: Simplify right side
   1,620.80x = 2,609,117.20
5. Step 5: Solve for x
   x = 2,609,117.20/1,620.80
6. Step 6: Final answer
   x = 1,609.78