Finding the Third Proportional to 10,121.63 and 13,618.13

Step by Step Solution

1. Step 1: Write the proportion equation
   10,121.63 : 13,618.13 = 13,618.13 : x
2. Step 2: Convert to fraction form
   10,121.63/13,618.13 = 13,618.13/x
3. Step 3: Cross multiply
   10,121.63x = 13,618.13 × 13,618.13
4. Step 4: Simplify right side
   10,121.63x = 185,453,328.52
5. Step 5: Solve for x
   x = 185,453,328.52/10,121.63
6. Step 6: Final answer
   x = 18,322.49