Finding the Fourth Proportional to 3,116.43, 4,300.77 and 1,790.40

Step by Step Solution

1. Step 1: Write the proportion equation
   3,116.43 : 4,300.77 = 1,790.40 : x
2. Step 2: Convert to fraction form
   3,116.43/4,300.77 = 1,790.40/x
3. Step 3: Cross multiply
   3,116.43x = 4,300.77 × 1,790.40
4. Step 4: Simplify right side
   3,116.43x = 7,700,068.15
5. Step 5: Solve for x
   x = 7,700,068.15/3,116.43
6. Step 6: Final answer
   x = 2,470.80