Finding the Third Proportional to 300,124.50 and 457,810.50

Step by Step Solution

1. Step 1: Write the proportion equation
   300,124.50 : 457,810.50 = 457,810.50 : x
2. Step 2: Convert to fraction form
   300,124.50/457,810.50 = 457,810.50/x
3. Step 3: Cross multiply
   300,124.50x = 457,810.50 × 457,810.50
4. Step 4: Simplify right side
   300,124.50x = 209,590,453,910.25
5. Step 5: Solve for x
   x = 209,590,453,910.25/300,124.50
6. Step 6: Final answer
   x = 698,345.03