Finding the Third Proportional to 148,126 and 318,730.50

Step by Step Solution

1. Step 1: Write the proportion equation
   148,126 : 318,730.50 = 318,730.50 : x
2. Step 2: Convert to fraction form
   148,126/318,730.50 = 318,730.50/x
3. Step 3: Cross multiply
   148,126x = 318,730.50 × 318,730.50
4. Step 4: Simplify right side
   148,126x = 101,589,131,630.25
5. Step 5: Solve for x
   x = 101,589,131,630.25/148,126
6. Step 6: Final answer
   x = 685,829.17