Finding the Fourth Proportional to 116,980.74, 161,415.32 and 65,991.24

Step by Step Solution

1. Step 1: Write the proportion equation
   116,980.74 : 161,415.32 = 65,991.24 : x
2. Step 2: Convert to fraction form
   116,980.74/161,415.32 = 65,991.24/x
3. Step 3: Cross multiply
   116,980.74x = 161,415.32 × 65,991.24
4. Step 4: Simplify right side
   116,980.74x = 10,651,996,791.84
5. Step 5: Solve for x
   x = 10,651,996,791.84/116,980.74
6. Step 6: Final answer
   x = 91,057.70