Finding the Fourth Proportional to 6,503.31, 9,742.73 and 3,212.55

Step by Step Solution

1. Step 1: Write the proportion equation
   6,503.31 : 9,742.73 = 3,212.55 : x
2. Step 2: Convert to fraction form
   6,503.31/9,742.73 = 3,212.55/x
3. Step 3: Cross multiply
   6,503.31x = 9,742.73 × 3,212.55
4. Step 4: Simplify right side
   6,503.31x = 31,298,991.20
5. Step 5: Solve for x
   x = 31,298,991.20/6,503.31
6. Step 6: Final answer
   x = 4,812.78