Finding the Third Proportional to 212,956.50 and 455,460

Step by Step Solution

1. Step 1: Write the proportion equation
   212,956.50 : 455,460 = 455,460 : x
2. Step 2: Convert to fraction form
   212,956.50/455,460 = 455,460/x
3. Step 3: Cross multiply
   212,956.50x = 455,460 × 455,460
4. Step 4: Simplify right side
   212,956.50x = 207,443,811,600
5. Step 5: Solve for x
   x = 207,443,811,600/212,956.50
6. Step 6: Final answer
   x = 974,113.55