Finding the Fourth Proportional to 12,609.81, 17,405.55 and 7,577.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,609.81 : 17,405.55 = 7,577.88 : x
2. Step 2: Convert to fraction form
   12,609.81/17,405.55 = 7,577.88/x
3. Step 3: Cross multiply
   12,609.81x = 17,405.55 × 7,577.88
4. Step 4: Simplify right side
   12,609.81x = 131,897,169.23
5. Step 5: Solve for x
   x = 131,897,169.23/12,609.81
6. Step 6: Final answer
   x = 10,459.89