Finding the Third Proportional to 251,508.50 and 392,572

Step by Step Solution

1. Step 1: Write the proportion equation
   251,508.50 : 392,572 = 392,572 : x
2. Step 2: Convert to fraction form
   251,508.50/392,572 = 392,572/x
3. Step 3: Cross multiply
   251,508.50x = 392,572 × 392,572
4. Step 4: Simplify right side
   251,508.50x = 154,112,775,184
5. Step 5: Solve for x
   x = 154,112,775,184/251,508.50
6. Step 6: Final answer
   x = 612,753.74