Finding the Third Proportional to 609,512.50 and 912,061.50

Step by Step Solution

1. Step 1: Write the proportion equation
   609,512.50 : 912,061.50 = 912,061.50 : x
2. Step 2: Convert to fraction form
   609,512.50/912,061.50 = 912,061.50/x
3. Step 3: Cross multiply
   609,512.50x = 912,061.50 × 912,061.50
4. Step 4: Simplify right side
   609,512.50x = 831,856,179,782.25
5. Step 5: Solve for x
   x = 831,856,179,782.25/609,512.50
6. Step 6: Final answer
   x = 1,364,789.37