Finding the Third Proportional to 64,684.13 and 89,071.31

Step by Step Solution

1. Step 1: Write the proportion equation
   64,684.13 : 89,071.31 = 89,071.31 : x
2. Step 2: Convert to fraction form
   64,684.13/89,071.31 = 89,071.31/x
3. Step 3: Cross multiply
   64,684.13x = 89,071.31 × 89,071.31
4. Step 4: Simplify right side
   64,684.13x = 7,933,698,710.47
5. Step 5: Solve for x
   x = 7,933,698,710.47/64,684.13
6. Step 6: Final answer
   x = 122,652.95