Finding the Third Proportional to 131,530 and 285,192.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131,530 : 285,192.50 = 285,192.50 : x
2. Step 2: Convert to fraction form
   131,530/285,192.50 = 285,192.50/x
3. Step 3: Cross multiply
   131,530x = 285,192.50 × 285,192.50
4. Step 4: Simplify right side
   131,530x = 81,334,762,056.25
5. Step 5: Solve for x
   x = 81,334,762,056.25/131,530
6. Step 6: Final answer
   x = 618,374.23