Finding the Third Proportional to 521,788.50 and 830,025

Step by Step Solution

1. Step 1: Write the proportion equation
   521,788.50 : 830,025 = 830,025 : x
2. Step 2: Convert to fraction form
   521,788.50/830,025 = 830,025/x
3. Step 3: Cross multiply
   521,788.50x = 830,025 × 830,025
4. Step 4: Simplify right side
   521,788.50x = 688,941,500,625
5. Step 5: Solve for x
   x = 688,941,500,625/521,788.50
6. Step 6: Final answer
   x = 1,320,346.27