Finding the Third Proportional to 721,478 and 1,142,380

Step by Step Solution

1. Step 1: Write the proportion equation
   721,478 : 1,142,380 = 1,142,380 : x
2. Step 2: Convert to fraction form
   721,478/1,142,380 = 1,142,380/x
3. Step 3: Cross multiply
   721,478x = 1,142,380 × 1,142,380
4. Step 4: Simplify right side
   721,478x = 1,305,032,064,400
5. Step 5: Solve for x
   x = 1,305,032,064,400/721,478
6. Step 6: Final answer
   x = 1,808,831.40