Finding the Third Proportional to 387,007.50 and 586,350

Step by Step Solution

1. Step 1: Write the proportion equation
   387,007.50 : 586,350 = 586,350 : x
2. Step 2: Convert to fraction form
   387,007.50/586,350 = 586,350/x
3. Step 3: Cross multiply
   387,007.50x = 586,350 × 586,350
4. Step 4: Simplify right side
   387,007.50x = 343,806,322,500
5. Step 5: Solve for x
   x = 343,806,322,500/387,007.50
6. Step 6: Final answer
   x = 888,371.21