Finding the Third Proportional to 42,107.63 and 66,964.78

Step by Step Solution

1. Step 1: Write the proportion equation
   42,107.63 : 66,964.78 = 66,964.78 : x
2. Step 2: Convert to fraction form
   42,107.63/66,964.78 = 66,964.78/x
3. Step 3: Cross multiply
   42,107.63x = 66,964.78 × 66,964.78
4. Step 4: Simplify right side
   42,107.63x = 4,484,281,927.86
5. Step 5: Solve for x
   x = 4,484,281,927.86/42,107.63
6. Step 6: Final answer
   x = 106,495.72