Finding the Fourth Proportional to 2,083.98, 3,126.89 and 1,621.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,083.98 : 3,126.89 = 1,621.07 : x
2. Step 2: Convert to fraction form
   2,083.98/3,126.89 = 1,621.07/x
3. Step 3: Cross multiply
   2,083.98x = 3,126.89 × 1,621.07
4. Step 4: Simplify right side
   2,083.98x = 5,068,898.60
5. Step 5: Solve for x
   x = 5,068,898.60/2,083.98
6. Step 6: Final answer
   x = 2,432.31