Finding the Fourth Proportional to 9,986.10, 14,955.79 and 7,892.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,986.10 : 14,955.79 = 7,892.05 : x
2. Step 2: Convert to fraction form
   9,986.10/14,955.79 = 7,892.05/x
3. Step 3: Cross multiply
   9,986.10x = 14,955.79 × 7,892.05
4. Step 4: Simplify right side
   9,986.10x = 118,031,842.47
5. Step 5: Solve for x
   x = 118,031,842.47/9,986.10
6. Step 6: Final answer
   x = 11,819.61