Finding the Fourth Proportional to 2,124.30, 3,188.85 and 1,259.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,124.30 : 3,188.85 = 1,259.10 : x
2. Step 2: Convert to fraction form
   2,124.30/3,188.85 = 1,259.10/x
3. Step 3: Cross multiply
   2,124.30x = 3,188.85 × 1,259.10
4. Step 4: Simplify right side
   2,124.30x = 4,015,081.04
5. Step 5: Solve for x
   x = 4,015,081.04/2,124.30
6. Step 6: Final answer
   x = 1,890.07