Finding the Third Proportional to 358,956 and 555,742.50

Step by Step Solution

1. Step 1: Write the proportion equation
   358,956 : 555,742.50 = 555,742.50 : x
2. Step 2: Convert to fraction form
   358,956/555,742.50 = 555,742.50/x
3. Step 3: Cross multiply
   358,956x = 555,742.50 × 555,742.50
4. Step 4: Simplify right side
   358,956x = 308,849,726,306.25
5. Step 5: Solve for x
   x = 308,849,726,306.25/358,956
6. Step 6: Final answer
   x = 860,411.10