Finding the Fourth Proportional to 70.00, 105.00 and 42.76

Step by Step Solution

1. Step 1: Write the proportion equation
   70.00 : 105.00 = 42.76 : x
2. Step 2: Convert to fraction form
   70.00/105.00 = 42.76/x
3. Step 3: Cross multiply
   70.00x = 105.00 × 42.76
4. Step 4: Simplify right side
   70.00x = 4,489.59
5. Step 5: Solve for x
   x = 4,489.59/70.00
6. Step 6: Final answer
   x = 64.14