Finding the Third Proportional to 221,641.31 and 351,017.30

Step by Step Solution

1. Step 1: Write the proportion equation
   221,641.31 : 351,017.30 = 351,017.30 : x
2. Step 2: Convert to fraction form
   221,641.31/351,017.30 = 351,017.30/x
3. Step 3: Cross multiply
   221,641.31x = 351,017.30 × 351,017.30
4. Step 4: Simplify right side
   221,641.31x = 123,213,142,705.43
5. Step 5: Solve for x
   x = 123,213,142,705.43/221,641.31
6. Step 6: Final answer
   x = 555,912.35