Finding the Third Proportional to 399,030 and 875,596.50

Step by Step Solution

1. Step 1: Write the proportion equation
   399,030 : 875,596.50 = 875,596.50 : x
2. Step 2: Convert to fraction form
   399,030/875,596.50 = 875,596.50/x
3. Step 3: Cross multiply
   399,030x = 875,596.50 × 875,596.50
4. Step 4: Simplify right side
   399,030x = 766,669,230,812.25
5. Step 5: Solve for x
   x = 766,669,230,812.25/399,030
6. Step 6: Final answer
   x = 1,921,332.31