Finding the Third Proportional to 346,475.50 and 518,300

Step by Step Solution

1. Step 1: Write the proportion equation
   346,475.50 : 518,300 = 518,300 : x
2. Step 2: Convert to fraction form
   346,475.50/518,300 = 518,300/x
3. Step 3: Cross multiply
   346,475.50x = 518,300 × 518,300
4. Step 4: Simplify right side
   346,475.50x = 268,634,890,000
5. Step 5: Solve for x
   x = 268,634,890,000/346,475.50
6. Step 6: Final answer
   x = 775,335.89