Finding the Third Proportional to 260,484.50 and 393,499.50

Step by Step Solution

1. Step 1: Write the proportion equation
   260,484.50 : 393,499.50 = 393,499.50 : x
2. Step 2: Convert to fraction form
   260,484.50/393,499.50 = 393,499.50/x
3. Step 3: Cross multiply
   260,484.50x = 393,499.50 × 393,499.50
4. Step 4: Simplify right side
   260,484.50x = 154,841,856,500.25
5. Step 5: Solve for x
   x = 154,841,856,500.25/260,484.50
6. Step 6: Final answer
   x = 594,437.89