Finding the Third Proportional to 455,478.75 and 648,838.69

Step by Step Solution

1. Step 1: Write the proportion equation
   455,478.75 : 648,838.69 = 648,838.69 : x
2. Step 2: Convert to fraction form
   455,478.75/648,838.69 = 648,838.69/x
3. Step 3: Cross multiply
   455,478.75x = 648,838.69 × 648,838.69
4. Step 4: Simplify right side
   455,478.75x = 420,991,642,396.72
5. Step 5: Solve for x
   x = 420,991,642,396.72/455,478.75
6. Step 6: Final answer
   x = 924,283.83