Finding the Third Proportional to 340,740 and 747,090

Step by Step Solution

1. Step 1: Write the proportion equation
   340,740 : 747,090 = 747,090 : x
2. Step 2: Convert to fraction form
   340,740/747,090 = 747,090/x
3. Step 3: Cross multiply
   340,740x = 747,090 × 747,090
4. Step 4: Simplify right side
   340,740x = 558,143,468,100
5. Step 5: Solve for x
   x = 558,143,468,100/340,740
6. Step 6: Final answer
   x = 1,638,033.30