Finding the Third Proportional to 711,390 and 1,085,152.50

Step by Step Solution

1. Step 1: Write the proportion equation
   711,390 : 1,085,152.50 = 1,085,152.50 : x
2. Step 2: Convert to fraction form
   711,390/1,085,152.50 = 1,085,152.50/x
3. Step 3: Cross multiply
   711,390x = 1,085,152.50 × 1,085,152.50
4. Step 4: Simplify right side
   711,390x = 1,177,555,948,256.25
5. Step 5: Solve for x
   x = 1,177,555,948,256.25/711,390
6. Step 6: Final answer
   x = 1,655,288.87