Finding the Third Proportional to 257,164.50 and 556,611

Step by Step Solution

1. Step 1: Write the proportion equation
   257,164.50 : 556,611 = 556,611 : x
2. Step 2: Convert to fraction form
   257,164.50/556,611 = 556,611/x
3. Step 3: Cross multiply
   257,164.50x = 556,611 × 556,611
4. Step 4: Simplify right side
   257,164.50x = 309,815,805,321
5. Step 5: Solve for x
   x = 309,815,805,321/257,164.50
6. Step 6: Final answer
   x = 1,204,737.84