Finding the Fourth Proportional to 9,426.60, 14,139.18 and 3,186.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,426.60 : 14,139.18 = 3,186.72 : x
2. Step 2: Convert to fraction form
   9,426.60/14,139.18 = 3,186.72/x
3. Step 3: Cross multiply
   9,426.60x = 14,139.18 × 3,186.72
4. Step 4: Simplify right side
   9,426.60x = 45,057,607.69
5. Step 5: Solve for x
   x = 45,057,607.69/9,426.60
6. Step 6: Final answer
   x = 4,779.84