Finding the Fourth Proportional to 13,018.72, 19,528.12 and 4,253.70

Step by Step Solution

1. Step 1: Write the proportion equation
   13,018.72 : 19,528.12 = 4,253.70 : x
2. Step 2: Convert to fraction form
   13,018.72/19,528.12 = 4,253.70/x
3. Step 3: Cross multiply
   13,018.72x = 19,528.12 × 4,253.70
4. Step 4: Simplify right side
   13,018.72x = 83,066,764.04
5. Step 5: Solve for x
   x = 83,066,764.04/13,018.72
6. Step 6: Final answer
   x = 6,380.56