Finding the Third Proportional to 140,437.50 and 300,558

Step by Step Solution

1. Step 1: Write the proportion equation
   140,437.50 : 300,558 = 300,558 : x
2. Step 2: Convert to fraction form
   140,437.50/300,558 = 300,558/x
3. Step 3: Cross multiply
   140,437.50x = 300,558 × 300,558
4. Step 4: Simplify right side
   140,437.50x = 90,335,111,364
5. Step 5: Solve for x
   x = 90,335,111,364/140,437.50
6. Step 6: Final answer
   x = 643,240.67