Finding the Fourth Proportional to 116,772.10, 161,112.15 and 65,766.98

Step by Step Solution

1. Step 1: Write the proportion equation
   116,772.10 : 161,112.15 = 65,766.98 : x
2. Step 2: Convert to fraction form
   116,772.10/161,112.15 = 65,766.98/x
3. Step 3: Cross multiply
   116,772.10x = 161,112.15 × 65,766.98
4. Step 4: Simplify right side
   116,772.10x = 10,595,858,741.25
5. Step 5: Solve for x
   x = 10,595,858,741.25/116,772.10
6. Step 6: Final answer
   x = 90,739.64