Finding the Fourth Proportional to 111,965.60, 156,959.20 and 111,965.60

Step by Step Solution

1. Step 1: Write the proportion equation
   111,965.60 : 156,959.20 = 111,965.60 : x
2. Step 2: Convert to fraction form
   111,965.60/156,959.20 = 111,965.60/x
3. Step 3: Cross multiply
   111,965.60x = 156,959.20 × 111,965.60
4. Step 4: Simplify right side
   111,965.60x = 17,574,031,003.52
5. Step 5: Solve for x
   x = 17,574,031,003.52/111,965.60
6. Step 6: Final answer
   x = 156,959.20