Finding the Third Proportional to 393,888 and 611,064.50

Step by Step Solution

1. Step 1: Write the proportion equation
   393,888 : 611,064.50 = 611,064.50 : x
2. Step 2: Convert to fraction form
   393,888/611,064.50 = 611,064.50/x
3. Step 3: Cross multiply
   393,888x = 611,064.50 × 611,064.50
4. Step 4: Simplify right side
   393,888x = 373,399,823,160.25
5. Step 5: Solve for x
   x = 373,399,823,160.25/393,888
6. Step 6: Final answer
   x = 947,984.77