Finding the Third Proportional to 252,290 and 379,488

Step by Step Solution

1. Step 1: Write the proportion equation
   252,290 : 379,488 = 379,488 : x
2. Step 2: Convert to fraction form
   252,290/379,488 = 379,488/x
3. Step 3: Cross multiply
   252,290x = 379,488 × 379,488
4. Step 4: Simplify right side
   252,290x = 144,011,142,144
5. Step 5: Solve for x
   x = 144,011,142,144/252,290
6. Step 6: Final answer
   x = 570,815.89