Finding the Fourth Proportional to 72.87, 109.32 and 45.83

Step by Step Solution

1. Step 1: Write the proportion equation
   72.87 : 109.32 = 45.83 : x
2. Step 2: Convert to fraction form
   72.87/109.32 = 45.83/x
3. Step 3: Cross multiply
   72.87x = 109.32 × 45.83
4. Step 4: Simplify right side
   72.87x = 5,010.24
5. Step 5: Solve for x
   x = 5,010.24/72.87
6. Step 6: Final answer
   x = 68.76