Finding the Fourth Proportional to 12,507.39, 18,763.61 and 5,112.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,507.39 : 18,763.61 = 5,112.45 : x
2. Step 2: Convert to fraction form
   12,507.39/18,763.61 = 5,112.45/x
3. Step 3: Cross multiply
   12,507.39x = 18,763.61 × 5,112.45
4. Step 4: Simplify right side
   12,507.39x = 95,927,992.38
5. Step 5: Solve for x
   x = 95,927,992.38/12,507.39
6. Step 6: Final answer
   x = 7,669.71