Finding the Fourth Proportional to 116,892.81, 161,308.85 and 65,905.10

Step by Step Solution

1. Step 1: Write the proportion equation
   116,892.81 : 161,308.85 = 65,905.10 : x
2. Step 2: Convert to fraction form
   116,892.81/161,308.85 = 65,905.10/x
3. Step 3: Cross multiply
   116,892.81x = 161,308.85 × 65,905.10
4. Step 4: Simplify right side
   116,892.81x = 10,631,075,358.97
5. Step 5: Solve for x
   x = 10,631,075,358.97/116,892.81
6. Step 6: Final answer
   x = 90,947.21