Finding the Third Proportional to 261,093 and 393,718.50

Step by Step Solution

1. Step 1: Write the proportion equation
   261,093 : 393,718.50 = 393,718.50 : x
2. Step 2: Convert to fraction form
   261,093/393,718.50 = 393,718.50/x
3. Step 3: Cross multiply
   261,093x = 393,718.50 × 393,718.50
4. Step 4: Simplify right side
   261,093x = 155,014,257,242.25
5. Step 5: Solve for x
   x = 155,014,257,242.25/261,093
6. Step 6: Final answer
   x = 593,712.80