Finding the Fourth Proportional to 81,196.96, 121,792.68 and 28,605.06

Step by Step Solution

1. Step 1: Write the proportion equation
   81,196.96 : 121,792.68 = 28,605.06 : x
2. Step 2: Convert to fraction form
   81,196.96/121,792.68 = 28,605.06/x
3. Step 3: Cross multiply
   81,196.96x = 121,792.68 × 28,605.06
4. Step 4: Simplify right side
   81,196.96x = 3,483,886,918.96
5. Step 5: Solve for x
   x = 3,483,886,918.96/81,196.96
6. Step 6: Final answer
   x = 42,906.62