Finding the Fourth Proportional to 91,016.24, 135,812.30 and 81,559.96

Step by Step Solution

1. Step 1: Write the proportion equation
   91,016.24 : 135,812.30 = 81,559.96 : x
2. Step 2: Convert to fraction form
   91,016.24/135,812.30 = 81,559.96/x
3. Step 3: Cross multiply
   91,016.24x = 135,812.30 × 81,559.96
4. Step 4: Simplify right side
   91,016.24x = 11,076,845,755.51
5. Step 5: Solve for x
   x = 11,076,845,755.51/91,016.24
6. Step 6: Final answer
   x = 121,701.86