Finding the Fourth Proportional to 61.94, 85.35 and 42.50

Step by Step Solution

1. Step 1: Write the proportion equation
   61.94 : 85.35 = 42.50 : x
2. Step 2: Convert to fraction form
   61.94/85.35 = 42.50/x
3. Step 3: Cross multiply
   61.94x = 85.35 × 42.50
4. Step 4: Simplify right side
   61.94x = 3,627.38
5. Step 5: Solve for x
   x = 3,627.38/61.94
6. Step 6: Final answer
   x = 58.56