Finding the Third Proportional to 358,785 and 555,187.50

Step by Step Solution

1. Step 1: Write the proportion equation
   358,785 : 555,187.50 = 555,187.50 : x
2. Step 2: Convert to fraction form
   358,785/555,187.50 = 555,187.50/x
3. Step 3: Cross multiply
   358,785x = 555,187.50 × 555,187.50
4. Step 4: Simplify right side
   358,785x = 308,233,160,156.25
5. Step 5: Solve for x
   x = 308,233,160,156.25/358,785
6. Step 6: Final answer
   x = 859,102.69