Finding the Third Proportional to 251,932.50 and 390,072

Step by Step Solution

1. Step 1: Write the proportion equation
   251,932.50 : 390,072 = 390,072 : x
2. Step 2: Convert to fraction form
   251,932.50/390,072 = 390,072/x
3. Step 3: Cross multiply
   251,932.50x = 390,072 × 390,072
4. Step 4: Simplify right side
   251,932.50x = 152,156,165,184
5. Step 5: Solve for x
   x = 152,156,165,184/251,932.50
6. Step 6: Final answer
   x = 603,956.08