Finding the Fourth Proportional to 116,633.40, 160,931.52 and 65,639.34

Step by Step Solution

1. Step 1: Write the proportion equation
   116,633.40 : 160,931.52 = 65,639.34 : x
2. Step 2: Convert to fraction form
   116,633.40/160,931.52 = 65,639.34/x
3. Step 3: Cross multiply
   116,633.40x = 160,931.52 × 65,639.34
4. Step 4: Simplify right side
   116,633.40x = 10,563,438,758.00
5. Step 5: Solve for x
   x = 10,563,438,758.00/116,633.40
6. Step 6: Final answer
   x = 90,569.59