Finding the Fourth Proportional to 9,986.22, 14,970.42 and 4,139.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,986.22 : 14,970.42 = 4,139.10 : x
2. Step 2: Convert to fraction form
   9,986.22/14,970.42 = 4,139.10/x
3. Step 3: Cross multiply
   9,986.22x = 14,970.42 × 4,139.10
4. Step 4: Simplify right side
   9,986.22x = 61,964,065.42
5. Step 5: Solve for x
   x = 61,964,065.42/9,986.22
6. Step 6: Final answer
   x = 6,204.96