Finding the Third Proportional to 207,381 and 423,508.50

Step by Step Solution

1. Step 1: Write the proportion equation
   207,381 : 423,508.50 = 423,508.50 : x
2. Step 2: Convert to fraction form
   207,381/423,508.50 = 423,508.50/x
3. Step 3: Cross multiply
   207,381x = 423,508.50 × 423,508.50
4. Step 4: Simplify right side
   207,381x = 179,359,449,572.25
5. Step 5: Solve for x
   x = 179,359,449,572.25/207,381
6. Step 6: Final answer
   x = 864,878.89