Finding the Fourth Proportional to 2,086.41, 3,130.20 and 699.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.41 : 3,130.20 = 699.90 : x
2. Step 2: Convert to fraction form
   2,086.41/3,130.20 = 699.90/x
3. Step 3: Cross multiply
   2,086.41x = 3,130.20 × 699.90
4. Step 4: Simplify right side
   2,086.41x = 2,190,826.98
5. Step 5: Solve for x
   x = 2,190,826.98/2,086.41
6. Step 6: Final answer
   x = 1,050.05