Finding the Third Proportional to 64,811.25 and 105,830.63

Step by Step Solution

1. Step 1: Write the proportion equation
   64,811.25 : 105,830.63 = 105,830.63 : x
2. Step 2: Convert to fraction form
   64,811.25/105,830.63 = 105,830.63/x
3. Step 3: Cross multiply
   64,811.25x = 105,830.63 × 105,830.63
4. Step 4: Simplify right side
   64,811.25x = 11,200,121,187.89
5. Step 5: Solve for x
   x = 11,200,121,187.89/64,811.25
6. Step 6: Final answer
   x = 172,811.37