Finding the Fourth Proportional to 111,951.60, 156,939.60 and 111,951.60

Step by Step Solution

1. Step 1: Write the proportion equation
   111,951.60 : 156,939.60 = 111,951.60 : x
2. Step 2: Convert to fraction form
   111,951.60/156,939.60 = 111,951.60/x
3. Step 3: Cross multiply
   111,951.60x = 156,939.60 × 111,951.60
4. Step 4: Simplify right side
   111,951.60x = 17,569,639,323.36
5. Step 5: Solve for x
   x = 17,569,639,323.36/111,951.60
6. Step 6: Final answer
   x = 156,939.60