Finding the Fourth Proportional to 109.51, 164.27 and 61.31

Step by Step Solution

1. Step 1: Write the proportion equation
   109.51 : 164.27 = 61.31 : x
2. Step 2: Convert to fraction form
   109.51/164.27 = 61.31/x
3. Step 3: Cross multiply
   109.51x = 164.27 × 61.31
4. Step 4: Simplify right side
   109.51x = 10,071.96
5. Step 5: Solve for x
   x = 10,071.96/109.51
6. Step 6: Final answer
   x = 91.98