Finding the Third Proportional to 688,861.50 and 1,086,123

Step by Step Solution

1. Step 1: Write the proportion equation
   688,861.50 : 1,086,123 = 1,086,123 : x
2. Step 2: Convert to fraction form
   688,861.50/1,086,123 = 1,086,123/x
3. Step 3: Cross multiply
   688,861.50x = 1,086,123 × 1,086,123
4. Step 4: Simplify right side
   688,861.50x = 1,179,663,171,129
5. Step 5: Solve for x
   x = 1,179,663,171,129/688,861.50
6. Step 6: Final answer
   x = 1,712,482.37