Finding the Fourth Proportional to 2,127.83, 3,188.09 and 1,690.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,127.83 : 3,188.09 = 1,690.43 : x
2. Step 2: Convert to fraction form
   2,127.83/3,188.09 = 1,690.43/x
3. Step 3: Cross multiply
   2,127.83x = 3,188.09 × 1,690.43
4. Step 4: Simplify right side
   2,127.83x = 5,389,242.98
5. Step 5: Solve for x
   x = 5,389,242.98/2,127.83
6. Step 6: Final answer
   x = 2,532.74