Finding the Third Proportional to 139,411.13 and 221,575.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,411.13 : 221,575.50 = 221,575.50 : x
2. Step 2: Convert to fraction form
   139,411.13/221,575.50 = 221,575.50/x
3. Step 3: Cross multiply
   139,411.13x = 221,575.50 × 221,575.50
4. Step 4: Simplify right side
   139,411.13x = 49,095,702,200.25
5. Step 5: Solve for x
   x = 49,095,702,200.25/139,411.13
6. Step 6: Final answer
   x = 352,164.88