Finding the Fourth Proportional to 72.63, 109.01 and 61.31

Step by Step Solution

1. Step 1: Write the proportion equation
   72.63 : 109.01 = 61.31 : x
2. Step 2: Convert to fraction form
   72.63/109.01 = 61.31/x
3. Step 3: Cross multiply
   72.63x = 109.01 × 61.31
4. Step 4: Simplify right side
   72.63x = 6,683.83
5. Step 5: Solve for x
   x = 6,683.83/72.63
6. Step 6: Final answer
   x = 92.03