Finding the Third Proportional to 42,304.78 and 64,789.88

Step by Step Solution

1. Step 1: Write the proportion equation
   42,304.78 : 64,789.88 = 64,789.88 : x
2. Step 2: Convert to fraction form
   42,304.78/64,789.88 = 64,789.88/x
3. Step 3: Cross multiply
   42,304.78x = 64,789.88 × 64,789.88
4. Step 4: Simplify right side
   42,304.78x = 4,197,727,902.52
5. Step 5: Solve for x
   x = 4,197,727,902.52/42,304.78
6. Step 6: Final answer
   x = 99,225.85