Finding the Third Proportional to 42,004 and 64,991

Step by Step Solution

1. Step 1: Write the proportion equation
   42,004 : 64,991 = 64,991 : x
2. Step 2: Convert to fraction form
   42,004/64,991 = 64,991/x
3. Step 3: Cross multiply
   42,004x = 64,991 × 64,991
4. Step 4: Simplify right side
   42,004x = 4,223,830,081
5. Step 5: Solve for x
   x = 4,223,830,081/42,004
6. Step 6: Final answer
   x = 100,557.81