Finding the Fourth Proportional to 116,697.20, 161,013.69 and 65,700

Step by Step Solution

1. Step 1: Write the proportion equation
   116,697.20 : 161,013.69 = 65,700 : x
2. Step 2: Convert to fraction form
   116,697.20/161,013.69 = 65,700/x
3. Step 3: Cross multiply
   116,697.20x = 161,013.69 × 65,700
4. Step 4: Simplify right side
   116,697.20x = 10,578,599,433
5. Step 5: Solve for x
   x = 10,578,599,433/116,697.20
6. Step 6: Final answer
   x = 90,649.99