Finding the Fourth Proportional to 2,069.59, 3,105.93 and 1,290.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,069.59 : 3,105.93 = 1,290.76 : x
2. Step 2: Convert to fraction form
   2,069.59/3,105.93 = 1,290.76/x
3. Step 3: Cross multiply
   2,069.59x = 3,105.93 × 1,290.76
4. Step 4: Simplify right side
   2,069.59x = 4,009,010.21
5. Step 5: Solve for x
   x = 4,009,010.21/2,069.59
6. Step 6: Final answer
   x = 1,937.10