Finding the Fourth Proportional to 1,620.45, 2,425.82 and 1,401.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,620.45 : 2,425.82 = 1,401.75 : x
2. Step 2: Convert to fraction form
   1,620.45/2,425.82 = 1,401.75/x
3. Step 3: Cross multiply
   1,620.45x = 2,425.82 × 1,401.75
4. Step 4: Simplify right side
   1,620.45x = 3,400,386.18
5. Step 5: Solve for x
   x = 3,400,386.18/1,620.45
6. Step 6: Final answer
   x = 2,098.42