Finding the Fourth Proportional to 116,405.36, 160,640.52 and 66,104.72

Step by Step Solution

1. Step 1: Write the proportion equation
   116,405.36 : 160,640.52 = 66,104.72 : x
2. Step 2: Convert to fraction form
   116,405.36/160,640.52 = 66,104.72/x
3. Step 3: Cross multiply
   116,405.36x = 160,640.52 × 66,104.72
4. Step 4: Simplify right side
   116,405.36x = 10,619,096,595.25
5. Step 5: Solve for x
   x = 10,619,096,595.25/116,405.36
6. Step 6: Final answer
   x = 91,225.15