Finding the Third Proportional to 248,970 and 377,215.50

Step by Step Solution

1. Step 1: Write the proportion equation
   248,970 : 377,215.50 = 377,215.50 : x
2. Step 2: Convert to fraction form
   248,970/377,215.50 = 377,215.50/x
3. Step 3: Cross multiply
   248,970x = 377,215.50 × 377,215.50
4. Step 4: Simplify right side
   248,970x = 142,291,533,440.25
5. Step 5: Solve for x
   x = 142,291,533,440.25/248,970
6. Step 6: Final answer
   x = 571,520.80