Finding the Third Proportional to 387,031.50 and 586,386

Step by Step Solution

1. Step 1: Write the proportion equation
   387,031.50 : 586,386 = 586,386 : x
2. Step 2: Convert to fraction form
   387,031.50/586,386 = 586,386/x
3. Step 3: Cross multiply
   387,031.50x = 586,386 × 586,386
4. Step 4: Simplify right side
   387,031.50x = 343,848,540,996
5. Step 5: Solve for x
   x = 343,848,540,996/387,031.50
6. Step 6: Final answer
   x = 888,425.21