Finding the Fourth Proportional to 116,786.25, 161,165.25 and 66,485.25

Step by Step Solution

1. Step 1: Write the proportion equation
   116,786.25 : 161,165.25 = 66,485.25 : x
2. Step 2: Convert to fraction form
   116,786.25/161,165.25 = 66,485.25/x
3. Step 3: Cross multiply
   116,786.25x = 161,165.25 × 66,485.25
4. Step 4: Simplify right side
   116,786.25x = 10,715,111,937.56
5. Step 5: Solve for x
   x = 10,715,111,937.56/116,786.25
6. Step 6: Final answer
   x = 91,749.77