Finding the Third Proportional to 340,690.50 and 716,688

Step by Step Solution

1. Step 1: Write the proportion equation
   340,690.50 : 716,688 = 716,688 : x
2. Step 2: Convert to fraction form
   340,690.50/716,688 = 716,688/x
3. Step 3: Cross multiply
   340,690.50x = 716,688 × 716,688
4. Step 4: Simplify right side
   340,690.50x = 513,641,689,344
5. Step 5: Solve for x
   x = 513,641,689,344/340,690.50
6. Step 6: Final answer
   x = 1,507,648.99