Finding the Fourth Proportional to 12,918.69, 19,373.18 and 7,654.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,918.69 : 19,373.18 = 7,654.86 : x
2. Step 2: Convert to fraction form
   12,918.69/19,373.18 = 7,654.86/x
3. Step 3: Cross multiply
   12,918.69x = 19,373.18 × 7,654.86
4. Step 4: Simplify right side
   12,918.69x = 148,298,942.38
5. Step 5: Solve for x
   x = 148,298,942.38/12,918.69
6. Step 6: Final answer
   x = 11,479.41