Finding the Fourth Proportional to 93.86, 140.83 and 42.50

Step by Step Solution

1. Step 1: Write the proportion equation
   93.86 : 140.83 = 42.50 : x
2. Step 2: Convert to fraction form
   93.86/140.83 = 42.50/x
3. Step 3: Cross multiply
   93.86x = 140.83 × 42.50
4. Step 4: Simplify right side
   93.86x = 5,985.28
5. Step 5: Solve for x
   x = 5,985.28/93.86
6. Step 6: Final answer
   x = 63.77