Finding the Fourth Proportional to 93.94, 140.77 and 72.50

Step by Step Solution

1. Step 1: Write the proportion equation
   93.94 : 140.77 = 72.50 : x
2. Step 2: Convert to fraction form
   93.94/140.77 = 72.50/x
3. Step 3: Cross multiply
   93.94x = 140.77 × 72.50
4. Step 4: Simplify right side
   93.94x = 10,205.83
5. Step 5: Solve for x
   x = 10,205.83/93.94
6. Step 6: Final answer
   x = 108.64