Finding the Third Proportional to 388,859 and 556,072

Step by Step Solution

1. Step 1: Write the proportion equation
   388,859 : 556,072 = 556,072 : x
2. Step 2: Convert to fraction form
   388,859/556,072 = 556,072/x
3. Step 3: Cross multiply
   388,859x = 556,072 × 556,072
4. Step 4: Simplify right side
   388,859x = 309,216,069,184
5. Step 5: Solve for x
   x = 309,216,069,184/388,859
6. Step 6: Final answer
   x = 795,188.15