Finding the Fourth Proportional to 117,131.56, 161,638.56 and 65,449.06

Step by Step Solution

1. Step 1: Write the proportion equation
   117,131.56 : 161,638.56 = 65,449.06 : x
2. Step 2: Convert to fraction form
   117,131.56/161,638.56 = 65,449.06/x
3. Step 3: Cross multiply
   117,131.56x = 161,638.56 × 65,449.06
4. Step 4: Simplify right side
   117,131.56x = 10,579,091,811.75
5. Step 5: Solve for x
   x = 10,579,091,811.75/117,131.56
6. Step 6: Final answer
   x = 90,318.03