Finding the Fourth Proportional to 72.94, 100.64 and 53.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72.94 : 100.64 = 53.50 : x
2. Step 2: Convert to fraction form
   72.94/100.64 = 53.50/x
3. Step 3: Cross multiply
   72.94x = 100.64 × 53.50
4. Step 4: Simplify right side
   72.94x = 5,384.24
5. Step 5: Solve for x
   x = 5,384.24/72.94
6. Step 6: Final answer
   x = 73.82