Finding the Third Proportional to 211,688 and 456,612.50

Step by Step Solution

1. Step 1: Write the proportion equation
   211,688 : 456,612.50 = 456,612.50 : x
2. Step 2: Convert to fraction form
   211,688/456,612.50 = 456,612.50/x
3. Step 3: Cross multiply
   211,688x = 456,612.50 × 456,612.50
4. Step 4: Simplify right side
   211,688x = 208,494,975,156.25
5. Step 5: Solve for x
   x = 208,494,975,156.25/211,688
6. Step 6: Final answer
   x = 984,916.36