Finding the Fourth Proportional to 354,667.97, 530,753.76 and 221,610.89

Step by Step Solution

1. Step 1: Write the proportion equation
   354,667.97 : 530,753.76 = 221,610.89 : x
2. Step 2: Convert to fraction form
   354,667.97/530,753.76 = 221,610.89/x
3. Step 3: Cross multiply
   354,667.97x = 530,753.76 × 221,610.89
4. Step 4: Simplify right side
   354,667.97x = 117,620,813,124.45
5. Step 5: Solve for x
   x = 117,620,813,124.45/354,667.97
6. Step 6: Final answer
   x = 331,636.41