Finding the Third Proportional to 692,640 and 1,038,978

Step by Step Solution

1. Step 1: Write the proportion equation
   692,640 : 1,038,978 = 1,038,978 : x
2. Step 2: Convert to fraction form
   692,640/1,038,978 = 1,038,978/x
3. Step 3: Cross multiply
   692,640x = 1,038,978 × 1,038,978
4. Step 4: Simplify right side
   692,640x = 1,079,475,284,484
5. Step 5: Solve for x
   x = 1,079,475,284,484/692,640
6. Step 6: Final answer
   x = 1,558,494.00