Finding the Fourth Proportional to 53.42, 73.78 and 43.18

Step by Step Solution

1. Step 1: Write the proportion equation
   53.42 : 73.78 = 43.18 : x
2. Step 2: Convert to fraction form
   53.42/73.78 = 43.18/x
3. Step 3: Cross multiply
   53.42x = 73.78 × 43.18
4. Step 4: Simplify right side
   53.42x = 3,185.82
5. Step 5: Solve for x
   x = 3,185.82/53.42
6. Step 6: Final answer
   x = 59.64