Finding the Fourth Proportional to 72.83, 109.16 and 64.69

Step by Step Solution

1. Step 1: Write the proportion equation
   72.83 : 109.16 = 64.69 : x
2. Step 2: Convert to fraction form
   72.83/109.16 = 64.69/x
3. Step 3: Cross multiply
   72.83x = 109.16 × 64.69
4. Step 4: Simplify right side
   72.83x = 7,060.69
5. Step 5: Solve for x
   x = 7,060.69/72.83
6. Step 6: Final answer
   x = 96.95