Finding the Third Proportional to 358,791 and 555,196.50

Step by Step Solution

1. Step 1: Write the proportion equation
   358,791 : 555,196.50 = 555,196.50 : x
2. Step 2: Convert to fraction form
   358,791/555,196.50 = 555,196.50/x
3. Step 3: Cross multiply
   358,791x = 555,196.50 × 555,196.50
4. Step 4: Simplify right side
   358,791x = 308,243,153,612.25
5. Step 5: Solve for x
   x = 308,243,153,612.25/358,791
6. Step 6: Final answer
   x = 859,116.18