Finding the Third Proportional to 171,042 and 268,312.50

Step by Step Solution

1. Step 1: Write the proportion equation
   171,042 : 268,312.50 = 268,312.50 : x
2. Step 2: Convert to fraction form
   171,042/268,312.50 = 268,312.50/x
3. Step 3: Cross multiply
   171,042x = 268,312.50 × 268,312.50
4. Step 4: Simplify right side
   171,042x = 71,991,597,656.25
5. Step 5: Solve for x
   x = 71,991,597,656.25/171,042
6. Step 6: Final answer
   x = 420,900.12