Finding the Third Proportional to 442,827 and 621,373.50

Step by Step Solution

1. Step 1: Write the proportion equation
   442,827 : 621,373.50 = 621,373.50 : x
2. Step 2: Convert to fraction form
   442,827/621,373.50 = 621,373.50/x
3. Step 3: Cross multiply
   442,827x = 621,373.50 × 621,373.50
4. Step 4: Simplify right side
   442,827x = 386,105,026,502.25
5. Step 5: Solve for x
   x = 386,105,026,502.25/442,827
6. Step 6: Final answer
   x = 871,909.41