Finding the Fourth Proportional to 116,967.93, 161,415.57 and 65,980.50

Step by Step Solution

1. Step 1: Write the proportion equation
   116,967.93 : 161,415.57 = 65,980.50 : x
2. Step 2: Convert to fraction form
   116,967.93/161,415.57 = 65,980.50/x
3. Step 3: Cross multiply
   116,967.93x = 161,415.57 × 65,980.50
4. Step 4: Simplify right side
   116,967.93x = 10,650,280,016.39
5. Step 5: Solve for x
   x = 10,650,280,016.39/116,967.93
6. Step 6: Final answer
   x = 91,052.99