Finding the Fourth Proportional to 116,756.72, 161,123.64 and 65,769.28

Step by Step Solution

1. Step 1: Write the proportion equation
   116,756.72 : 161,123.64 = 65,769.28 : x
2. Step 2: Convert to fraction form
   116,756.72/161,123.64 = 65,769.28/x
3. Step 3: Cross multiply
   116,756.72x = 161,123.64 × 65,769.28
4. Step 4: Simplify right side
   116,756.72x = 10,596,985,793.78
5. Step 5: Solve for x
   x = 10,596,985,793.78/116,756.72
6. Step 6: Final answer
   x = 90,761.25