Finding the Fourth Proportional to 12,665.40, 19,004.94 and 5,274.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,665.40 : 19,004.94 = 5,274.96 : x
2. Step 2: Convert to fraction form
   12,665.40/19,004.94 = 5,274.96/x
3. Step 3: Cross multiply
   12,665.40x = 19,004.94 × 5,274.96
4. Step 4: Simplify right side
   12,665.40x = 100,250,298.30
5. Step 5: Solve for x
   x = 100,250,298.30/12,665.40
6. Step 6: Final answer
   x = 7,915.29