Finding the Third Proportional to 715,431 and 1,516,155

Step by Step Solution

1. Step 1: Write the proportion equation
   715,431 : 1,516,155 = 1,516,155 : x
2. Step 2: Convert to fraction form
   715,431/1,516,155 = 1,516,155/x
3. Step 3: Cross multiply
   715,431x = 1,516,155 × 1,516,155
4. Step 4: Simplify right side
   715,431x = 2,298,725,984,025
5. Step 5: Solve for x
   x = 2,298,725,984,025/715,431
6. Step 6: Final answer
   x = 3,213,064.55