Finding the Fourth Proportional to 150,879.21, 208,212.48 and 81,968.10

Step by Step Solution

1. Step 1: Write the proportion equation
   150,879.21 : 208,212.48 = 81,968.10 : x
2. Step 2: Convert to fraction form
   150,879.21/208,212.48 = 81,968.10/x
3. Step 3: Cross multiply
   150,879.21x = 208,212.48 × 81,968.10
4. Step 4: Simplify right side
   150,879.21x = 17,066,781,381.89
5. Step 5: Solve for x
   x = 17,066,781,381.89/150,879.21
6. Step 6: Final answer
   x = 113,115.53