Finding the Fourth Proportional to 2,106.51, 3,162.50 and 1,619.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,106.51 : 3,162.50 = 1,619.90 : x
2. Step 2: Convert to fraction form
   2,106.51/3,162.50 = 1,619.90/x
3. Step 3: Cross multiply
   2,106.51x = 3,162.50 × 1,619.90
4. Step 4: Simplify right side
   2,106.51x = 5,122,945.71
5. Step 5: Solve for x
   x = 5,122,945.71/2,106.51
6. Step 6: Final answer
   x = 2,431.96