Finding the Third Proportional to 147,672 and 316,345.50

Step by Step Solution

1. Step 1: Write the proportion equation
   147,672 : 316,345.50 = 316,345.50 : x
2. Step 2: Convert to fraction form
   147,672/316,345.50 = 316,345.50/x
3. Step 3: Cross multiply
   147,672x = 316,345.50 × 316,345.50
4. Step 4: Simplify right side
   147,672x = 100,074,475,370.25
5. Step 5: Solve for x
   x = 100,074,475,370.25/147,672
6. Step 6: Final answer
   x = 677,680.77