Finding the Fourth Proportional to 6,978.39, 9,630.05 and 3,953.50

Step by Step Solution

1. Step 1: Write the proportion equation
   6,978.39 : 9,630.05 = 3,953.50 : x
2. Step 2: Convert to fraction form
   6,978.39/9,630.05 = 3,953.50/x
3. Step 3: Cross multiply
   6,978.39x = 9,630.05 × 3,953.50
4. Step 4: Simplify right side
   6,978.39x = 38,072,402.68
5. Step 5: Solve for x
   x = 38,072,402.68/6,978.39
6. Step 6: Final answer
   x = 5,455.76