Finding the Third Proportional to 316,920 and 434,551.50

Step by Step Solution

1. Step 1: Write the proportion equation
   316,920 : 434,551.50 = 434,551.50 : x
2. Step 2: Convert to fraction form
   316,920/434,551.50 = 434,551.50/x
3. Step 3: Cross multiply
   316,920x = 434,551.50 × 434,551.50
4. Step 4: Simplify right side
   316,920x = 188,835,006,152.25
5. Step 5: Solve for x
   x = 188,835,006,152.25/316,920
6. Step 6: Final answer
   x = 595,844.40