Finding the Third Proportional to 145,974 and 316,870.50

Step by Step Solution

1. Step 1: Write the proportion equation
   145,974 : 316,870.50 = 316,870.50 : x
2. Step 2: Convert to fraction form
   145,974/316,870.50 = 316,870.50/x
3. Step 3: Cross multiply
   145,974x = 316,870.50 × 316,870.50
4. Step 4: Simplify right side
   145,974x = 100,406,913,770.25
5. Step 5: Solve for x
   x = 100,406,913,770.25/145,974
6. Step 6: Final answer
   x = 687,841.08