Finding the Third Proportional to 145,554 and 318,263.50

Step by Step Solution

1. Step 1: Write the proportion equation
   145,554 : 318,263.50 = 318,263.50 : x
2. Step 2: Convert to fraction form
   145,554/318,263.50 = 318,263.50/x
3. Step 3: Cross multiply
   145,554x = 318,263.50 × 318,263.50
4. Step 4: Simplify right side
   145,554x = 101,291,655,432.25
5. Step 5: Solve for x
   x = 101,291,655,432.25/145,554
6. Step 6: Final answer
   x = 695,904.31