Finding the Fourth Proportional to 6,983.21, 10,478.42 and 3,090.35

Step by Step Solution

1. Step 1: Write the proportion equation
   6,983.21 : 10,478.42 = 3,090.35 : x
2. Step 2: Convert to fraction form
   6,983.21/10,478.42 = 3,090.35/x
3. Step 3: Cross multiply
   6,983.21x = 10,478.42 × 3,090.35
4. Step 4: Simplify right side
   6,983.21x = 32,381,985.25
5. Step 5: Solve for x
   x = 32,381,985.25/6,983.21
6. Step 6: Final answer
   x = 4,637.12