Finding the Fourth Proportional to 69.59, 104.17 and 42.45

Step by Step Solution

1. Step 1: Write the proportion equation
   69.59 : 104.17 = 42.45 : x
2. Step 2: Convert to fraction form
   69.59/104.17 = 42.45/x
3. Step 3: Cross multiply
   69.59x = 104.17 × 42.45
4. Step 4: Simplify right side
   69.59x = 4,422.02
5. Step 5: Solve for x
   x = 4,422.02/69.59
6. Step 6: Final answer
   x = 63.54