Finding the Fourth Proportional to 3,109.70, 4,291.61 and 1,783.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,109.70 : 4,291.61 = 1,783.59 : x
2. Step 2: Convert to fraction form
   3,109.70/4,291.61 = 1,783.59/x
3. Step 3: Cross multiply
   3,109.70x = 4,291.61 × 1,783.59
4. Step 4: Simplify right side
   3,109.70x = 7,654,463.76
5. Step 5: Solve for x
   x = 7,654,463.76/3,109.70
6. Step 6: Final answer
   x = 2,461.48