Finding the Fourth Proportional to 221,483.83, 332,250.59 and 81,242.05

Step by Step Solution

1. Step 1: Write the proportion equation
   221,483.83 : 332,250.59 = 81,242.05 : x
2. Step 2: Convert to fraction form
   221,483.83/332,250.59 = 81,242.05/x
3. Step 3: Cross multiply
   221,483.83x = 332,250.59 × 81,242.05
4. Step 4: Simplify right side
   221,483.83x = 26,992,719,045.31
5. Step 5: Solve for x
   x = 26,992,719,045.31/221,483.83
6. Step 6: Final answer
   x = 121,872.19