Finding the Third Proportional to 201,789 and 424,490.63

Step by Step Solution

1. Step 1: Write the proportion equation
   201,789 : 424,490.63 = 424,490.63 : x
2. Step 2: Convert to fraction form
   201,789/424,490.63 = 424,490.63/x
3. Step 3: Cross multiply
   201,789x = 424,490.63 × 424,490.63
4. Step 4: Simplify right side
   201,789x = 180,192,290,712.89
5. Step 5: Solve for x
   x = 180,192,290,712.89/201,789
6. Step 6: Final answer
   x = 892,973.80