Finding the Third Proportional to 13,409.63 and 15,880.13

Step by Step Solution

1. Step 1: Write the proportion equation
   13,409.63 : 15,880.13 = 15,880.13 : x
2. Step 2: Convert to fraction form
   13,409.63/15,880.13 = 15,880.13/x
3. Step 3: Cross multiply
   13,409.63x = 15,880.13 × 15,880.13
4. Step 4: Simplify right side
   13,409.63x = 252,178,370.02
5. Step 5: Solve for x
   x = 252,178,370.02/13,409.63
6. Step 6: Final answer
   x = 18,805.77