Finding the Third Proportional to 221,686.50 and 459,138

Step by Step Solution

1. Step 1: Write the proportion equation
   221,686.50 : 459,138 = 459,138 : x
2. Step 2: Convert to fraction form
   221,686.50/459,138 = 459,138/x
3. Step 3: Cross multiply
   221,686.50x = 459,138 × 459,138
4. Step 4: Simplify right side
   221,686.50x = 210,807,703,044
5. Step 5: Solve for x
   x = 210,807,703,044/221,686.50
6. Step 6: Final answer
   x = 950,927.11