Finding the Fourth Proportional to 18,488.70, 25,513.56 and 10,530.72

Step by Step Solution

1. Step 1: Write the proportion equation
   18,488.70 : 25,513.56 = 10,530.72 : x
2. Step 2: Convert to fraction form
   18,488.70/25,513.56 = 10,530.72/x
3. Step 3: Cross multiply
   18,488.70x = 25,513.56 × 10,530.72
4. Step 4: Simplify right side
   18,488.70x = 268,676,156.56
5. Step 5: Solve for x
   x = 268,676,156.56/18,488.70
6. Step 6: Final answer
   x = 14,531.91