Finding the Fourth Proportional to 116,139.96, 160,302.78 and 65,868.12

Step by Step Solution

1. Step 1: Write the proportion equation
   116,139.96 : 160,302.78 = 65,868.12 : x
2. Step 2: Convert to fraction form
   116,139.96/160,302.78 = 65,868.12/x
3. Step 3: Cross multiply
   116,139.96x = 160,302.78 × 65,868.12
4. Step 4: Simplify right side
   116,139.96x = 10,558,842,749.37
5. Step 5: Solve for x
   x = 10,558,842,749.37/116,139.96
6. Step 6: Final answer
   x = 90,914.81