Finding the Fourth Proportional to 53.42, 73.72 and 31.59

Step by Step Solution

1. Step 1: Write the proportion equation
   53.42 : 73.72 = 31.59 : x
2. Step 2: Convert to fraction form
   53.42/73.72 = 31.59/x
3. Step 3: Cross multiply
   53.42x = 73.72 × 31.59
4. Step 4: Simplify right side
   53.42x = 2,328.81
5. Step 5: Solve for x
   x = 2,328.81/53.42
6. Step 6: Final answer
   x = 43.59