Finding the Fourth Proportional to 42.84, 64.75 and 42.84

Step by Step Solution

1. Step 1: Write the proportion equation
   42.84 : 64.75 = 42.84 : x
2. Step 2: Convert to fraction form
   42.84/64.75 = 42.84/x
3. Step 3: Cross multiply
   42.84x = 64.75 × 42.84
4. Step 4: Simplify right side
   42.84x = 2,773.89
5. Step 5: Solve for x
   x = 2,773.89/42.84
6. Step 6: Final answer
   x = 64.75