Finding the Fourth Proportional to 35.42, 53.06 and 28.70

Step by Step Solution

1. Step 1: Write the proportion equation
   35.42 : 53.06 = 28.70 : x
2. Step 2: Convert to fraction form
   35.42/53.06 = 28.70/x
3. Step 3: Cross multiply
   35.42x = 53.06 × 28.70
4. Step 4: Simplify right side
   35.42x = 1,522.82
5. Step 5: Solve for x
   x = 1,522.82/35.42
6. Step 6: Final answer
   x = 42.99