Finding the Fourth Proportional to 107,632.10, 161,448.15 and 82,720.10

Step by Step Solution

1. Step 1: Write the proportion equation
   107,632.10 : 161,448.15 = 82,720.10 : x
2. Step 2: Convert to fraction form
   107,632.10/161,448.15 = 82,720.10/x
3. Step 3: Cross multiply
   107,632.10x = 161,448.15 × 82,720.10
4. Step 4: Simplify right side
   107,632.10x = 13,355,007,112.82
5. Step 5: Solve for x
   x = 13,355,007,112.82/107,632.10
6. Step 6: Final answer
   x = 124,080.15