Finding the Fourth Proportional to 73.02, 100.78 and 53.30

Step by Step Solution

1. Step 1: Write the proportion equation
   73.02 : 100.78 = 53.30 : x
2. Step 2: Convert to fraction form
   73.02/100.78 = 53.30/x
3. Step 3: Cross multiply
   73.02x = 100.78 × 53.30
4. Step 4: Simplify right side
   73.02x = 5,371.57
5. Step 5: Solve for x
   x = 5,371.57/73.02
6. Step 6: Final answer
   x = 73.56