Finding the Third Proportional to 615,529.50 and 1,389,111

Step by Step Solution

1. Step 1: Write the proportion equation
   615,529.50 : 1,389,111 = 1,389,111 : x
2. Step 2: Convert to fraction form
   615,529.50/1,389,111 = 1,389,111/x
3. Step 3: Cross multiply
   615,529.50x = 1,389,111 × 1,389,111
4. Step 4: Simplify right side
   615,529.50x = 1,929,629,370,321
5. Step 5: Solve for x
   x = 1,929,629,370,321/615,529.50
6. Step 6: Final answer
   x = 3,134,909.65