Finding the Fourth Proportional to 7,090.47, 10,628.31 and 3,965.90

Step by Step Solution

1. Step 1: Write the proportion equation
   7,090.47 : 10,628.31 = 3,965.90 : x
2. Step 2: Convert to fraction form
   7,090.47/10,628.31 = 3,965.90/x
3. Step 3: Cross multiply
   7,090.47x = 10,628.31 × 3,965.90
4. Step 4: Simplify right side
   7,090.47x = 42,150,776.36
5. Step 5: Solve for x
   x = 42,150,776.36/7,090.47
6. Step 6: Final answer
   x = 5,944.71