Finding the Third Proportional to 688,312 and 1,476,240

Step by Step Solution

1. Step 1: Write the proportion equation
   688,312 : 1,476,240 = 1,476,240 : x
2. Step 2: Convert to fraction form
   688,312/1,476,240 = 1,476,240/x
3. Step 3: Cross multiply
   688,312x = 1,476,240 × 1,476,240
4. Step 4: Simplify right side
   688,312x = 2,179,284,537,600
5. Step 5: Solve for x
   x = 2,179,284,537,600/688,312
6. Step 6: Final answer
   x = 3,166,128.93