Finding the Third Proportional to 260,215.50 and 402,141

Step by Step Solution

1. Step 1: Write the proportion equation
   260,215.50 : 402,141 = 402,141 : x
2. Step 2: Convert to fraction form
   260,215.50/402,141 = 402,141/x
3. Step 3: Cross multiply
   260,215.50x = 402,141 × 402,141
4. Step 4: Simplify right side
   260,215.50x = 161,717,383,881
5. Step 5: Solve for x
   x = 161,717,383,881/260,215.50
6. Step 6: Final answer
   x = 621,474.83