Finding the Fourth Proportional to 72.93, 100.72 and 65.30

Step by Step Solution

1. Step 1: Write the proportion equation
   72.93 : 100.72 = 65.30 : x
2. Step 2: Convert to fraction form
   72.93/100.72 = 65.30/x
3. Step 3: Cross multiply
   72.93x = 100.72 × 65.30
4. Step 4: Simplify right side
   72.93x = 6,577.02
5. Step 5: Solve for x
   x = 6,577.02/72.93
6. Step 6: Final answer
   x = 90.18