Finding the Fourth Proportional to 102.58, 141.59 and 76.37

Step by Step Solution

1. Step 1: Write the proportion equation
   102.58 : 141.59 = 76.37 : x
2. Step 2: Convert to fraction form
   102.58/141.59 = 76.37/x
3. Step 3: Cross multiply
   102.58x = 141.59 × 76.37
4. Step 4: Simplify right side
   102.58x = 10,813.20
5. Step 5: Solve for x
   x = 10,813.20/102.58
6. Step 6: Final answer
   x = 105.41