Finding the Third Proportional to 715,784 and 1,559,440

Step by Step Solution

1. Step 1: Write the proportion equation
   715,784 : 1,559,440 = 1,559,440 : x
2. Step 2: Convert to fraction form
   715,784/1,559,440 = 1,559,440/x
3. Step 3: Cross multiply
   715,784x = 1,559,440 × 1,559,440
4. Step 4: Simplify right side
   715,784x = 2,431,853,113,600
5. Step 5: Solve for x
   x = 2,431,853,113,600/715,784
6. Step 6: Final answer
   x = 3,397,467.83