Finding the Fourth Proportional to 6,971.50, 9,620.69 and 3,784.79

Step by Step Solution

1. Step 1: Write the proportion equation
   6,971.50 : 9,620.69 = 3,784.79 : x
2. Step 2: Convert to fraction form
   6,971.50/9,620.69 = 3,784.79/x
3. Step 3: Cross multiply
   6,971.50x = 9,620.69 × 3,784.79
4. Step 4: Simplify right side
   6,971.50x = 36,412,291.31
5. Step 5: Solve for x
   x = 36,412,291.31/6,971.50
6. Step 6: Final answer
   x = 5,223.02