Finding the Third Proportional to 387,042.75 and 586,404

Step by Step Solution

1. Step 1: Write the proportion equation
   387,042.75 : 586,404 = 586,404 : x
2. Step 2: Convert to fraction form
   387,042.75/586,404 = 586,404/x
3. Step 3: Cross multiply
   387,042.75x = 586,404 × 586,404
4. Step 4: Simplify right side
   387,042.75x = 343,869,651,216
5. Step 5: Solve for x
   x = 343,869,651,216/387,042.75
6. Step 6: Final answer
   x = 888,453.93