Finding the Third Proportional to 42,557 and 64,428

Step by Step Solution

1. Step 1: Write the proportion equation
   42,557 : 64,428 = 64,428 : x
2. Step 2: Convert to fraction form
   42,557/64,428 = 64,428/x
3. Step 3: Cross multiply
   42,557x = 64,428 × 64,428
4. Step 4: Simplify right side
   42,557x = 4,150,967,184
5. Step 5: Solve for x
   x = 4,150,967,184/42,557
6. Step 6: Final answer
   x = 97,539.00