Finding the Fourth Proportional to 12,507.64, 18,761.50 and 5,112.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,507.64 : 18,761.50 = 5,112.10 : x
2. Step 2: Convert to fraction form
   12,507.64/18,761.50 = 5,112.10/x
3. Step 3: Cross multiply
   12,507.64x = 18,761.50 × 5,112.10
4. Step 4: Simplify right side
   12,507.64x = 95,910,664.15
5. Step 5: Solve for x
   x = 95,910,664.15/12,507.64
6. Step 6: Final answer
   x = 7,668.17