Finding the Third Proportional to 264,411 and 402,812.50

Step by Step Solution

1. Step 1: Write the proportion equation
   264,411 : 402,812.50 = 402,812.50 : x
2. Step 2: Convert to fraction form
   264,411/402,812.50 = 402,812.50/x
3. Step 3: Cross multiply
   264,411x = 402,812.50 × 402,812.50
4. Step 4: Simplify right side
   264,411x = 162,257,910,156.25
5. Step 5: Solve for x
   x = 162,257,910,156.25/264,411
6. Step 6: Final answer
   x = 613,657.94