Finding the Third Proportional to 311,526 and 486,121.50

Step by Step Solution

1. Step 1: Write the proportion equation
   311,526 : 486,121.50 = 486,121.50 : x
2. Step 2: Convert to fraction form
   311,526/486,121.50 = 486,121.50/x
3. Step 3: Cross multiply
   311,526x = 486,121.50 × 486,121.50
4. Step 4: Simplify right side
   311,526x = 236,314,112,762.25
5. Step 5: Solve for x
   x = 236,314,112,762.25/311,526
6. Step 6: Final answer
   x = 758,569.47