Finding the Fourth Proportional to 111,949.60, 156,936.80 and 111,949.60

Step by Step Solution

1. Step 1: Write the proportion equation
   111,949.60 : 156,936.80 = 111,949.60 : x
2. Step 2: Convert to fraction form
   111,949.60/156,936.80 = 111,949.60/x
3. Step 3: Cross multiply
   111,949.60x = 156,936.80 × 111,949.60
4. Step 4: Simplify right side
   111,949.60x = 17,569,011,985.28
5. Step 5: Solve for x
   x = 17,569,011,985.28/111,949.60
6. Step 6: Final answer
   x = 156,936.80