Finding the Fourth Proportional to 104,300.68, 155,109.20 and 100,979.16

Step by Step Solution

1. Step 1: Write the proportion equation
   104,300.68 : 155,109.20 = 100,979.16 : x
2. Step 2: Convert to fraction form
   104,300.68/155,109.20 = 100,979.16/x
3. Step 3: Cross multiply
   104,300.68x = 155,109.20 × 100,979.16
4. Step 4: Simplify right side
   104,300.68x = 15,662,796,724.27
5. Step 5: Solve for x
   x = 15,662,796,724.27/104,300.68
6. Step 6: Final answer
   x = 150,169.65