Finding the Third Proportional to 13,663.69 and 31,402.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,663.69 : 31,402.69 = 31,402.69 : x
2. Step 2: Convert to fraction form
   13,663.69/31,402.69 = 31,402.69/x
3. Step 3: Cross multiply
   13,663.69x = 31,402.69 × 31,402.69
4. Step 4: Simplify right side
   13,663.69x = 986,128,782.22
5. Step 5: Solve for x
   x = 986,128,782.22/13,663.69
6. Step 6: Final answer
   x = 72,171.50