Finding the Third Proportional to 42,911.50 and 64,123.75

Step by Step Solution

1. Step 1: Write the proportion equation
   42,911.50 : 64,123.75 = 64,123.75 : x
2. Step 2: Convert to fraction form
   42,911.50/64,123.75 = 64,123.75/x
3. Step 3: Cross multiply
   42,911.50x = 64,123.75 × 64,123.75
4. Step 4: Simplify right side
   42,911.50x = 4,111,855,314.06
5. Step 5: Solve for x
   x = 4,111,855,314.06/42,911.50
6. Step 6: Final answer
   x = 95,821.76