Finding the Fourth Proportional to 13,429.68, 18,538.64 and 9,064.96

Step by Step Solution

1. Step 1: Write the proportion equation
   13,429.68 : 18,538.64 = 9,064.96 : x
2. Step 2: Convert to fraction form
   13,429.68/18,538.64 = 9,064.96/x
3. Step 3: Cross multiply
   13,429.68x = 18,538.64 × 9,064.96
4. Step 4: Simplify right side
   13,429.68x = 168,051,978.46
5. Step 5: Solve for x
   x = 168,051,978.46/13,429.68
6. Step 6: Final answer
   x = 12,513.48