Finding the Fourth Proportional to 103,723.60, 155,196.60 and 68,731.60

Step by Step Solution

1. Step 1: Write the proportion equation
   103,723.60 : 155,196.60 = 68,731.60 : x
2. Step 2: Convert to fraction form
   103,723.60/155,196.60 = 68,731.60/x
3. Step 3: Cross multiply
   103,723.60x = 155,196.60 × 68,731.60
4. Step 4: Simplify right side
   103,723.60x = 10,666,910,632.56
5. Step 5: Solve for x
   x = 10,666,910,632.56/103,723.60
6. Step 6: Final answer
   x = 102,839.76