Finding the Third Proportional to 215,068.50 and 300,807

Step by Step Solution

1. Step 1: Write the proportion equation
   215,068.50 : 300,807 = 300,807 : x
2. Step 2: Convert to fraction form
   215,068.50/300,807 = 300,807/x
3. Step 3: Cross multiply
   215,068.50x = 300,807 × 300,807
4. Step 4: Simplify right side
   215,068.50x = 90,484,851,249
5. Step 5: Solve for x
   x = 90,484,851,249/215,068.50
6. Step 6: Final answer
   x = 420,725.73