Finding the Fourth Proportional to 242,490.63, 363,736.59 and 84,719.05

Step by Step Solution

1. Step 1: Write the proportion equation
   242,490.63 : 363,736.59 = 84,719.05 : x
2. Step 2: Convert to fraction form
   242,490.63/363,736.59 = 84,719.05/x
3. Step 3: Cross multiply
   242,490.63x = 363,736.59 × 84,719.05
4. Step 4: Simplify right side
   242,490.63x = 30,815,418,355.04
5. Step 5: Solve for x
   x = 30,815,418,355.04/242,490.63
6. Step 6: Final answer
   x = 127,078.80