Finding the Third Proportional to 42,558 and 64,429.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,558 : 64,429.50 = 64,429.50 : x
2. Step 2: Convert to fraction form
   42,558/64,429.50 = 64,429.50/x
3. Step 3: Cross multiply
   42,558x = 64,429.50 × 64,429.50
4. Step 4: Simplify right side
   42,558x = 4,151,160,470.25
5. Step 5: Solve for x
   x = 4,151,160,470.25/42,558
6. Step 6: Final answer
   x = 97,541.25