Finding the Fourth Proportional to 242,192.72, 363,290.96 and 84,420.72

Step by Step Solution

1. Step 1: Write the proportion equation
   242,192.72 : 363,290.96 = 84,420.72 : x
2. Step 2: Convert to fraction form
   242,192.72/363,290.96 = 84,420.72/x
3. Step 3: Cross multiply
   242,192.72x = 363,290.96 × 84,420.72
4. Step 4: Simplify right side
   242,192.72x = 30,669,284,412.69
5. Step 5: Solve for x
   x = 30,669,284,412.69/242,192.72
6. Step 6: Final answer
   x = 126,631.74