Finding the Third Proportional to 715,438.50 and 1,555,123.50

Step by Step Solution

1. Step 1: Write the proportion equation
   715,438.50 : 1,555,123.50 = 1,555,123.50 : x
2. Step 2: Convert to fraction form
   715,438.50/1,555,123.50 = 1,555,123.50/x
3. Step 3: Cross multiply
   715,438.50x = 1,555,123.50 × 1,555,123.50
4. Step 4: Simplify right side
   715,438.50x = 2,418,409,100,252.25
5. Step 5: Solve for x
   x = 2,418,409,100,252.25/715,438.50
6. Step 6: Final answer
   x = 3,380,317.25