Finding the Third Proportional to 42,623.72 and 64,539.28

Step by Step Solution

1. Step 1: Write the proportion equation
   42,623.72 : 64,539.28 = 64,539.28 : x
2. Step 2: Convert to fraction form
   42,623.72/64,539.28 = 64,539.28/x
3. Step 3: Cross multiply
   42,623.72x = 64,539.28 × 64,539.28
4. Step 4: Simplify right side
   42,623.72x = 4,165,318,824.27
5. Step 5: Solve for x
   x = 4,165,318,824.27/42,623.72
6. Step 6: Final answer
   x = 97,723.03