Finding the Third Proportional to 393,921 and 590,737.50

Step by Step Solution

1. Step 1: Write the proportion equation
   393,921 : 590,737.50 = 590,737.50 : x
2. Step 2: Convert to fraction form
   393,921/590,737.50 = 590,737.50/x
3. Step 3: Cross multiply
   393,921x = 590,737.50 × 590,737.50
4. Step 4: Simplify right side
   393,921x = 348,970,793,906.25
5. Step 5: Solve for x
   x = 348,970,793,906.25/393,921
6. Step 6: Final answer
   x = 885,890.30