Finding the Third Proportional to 369,478.50 and 556,860

Step by Step Solution

1. Step 1: Write the proportion equation
   369,478.50 : 556,860 = 556,860 : x
2. Step 2: Convert to fraction form
   369,478.50/556,860 = 556,860/x
3. Step 3: Cross multiply
   369,478.50x = 556,860 × 556,860
4. Step 4: Simplify right side
   369,478.50x = 310,093,059,600
5. Step 5: Solve for x
   x = 310,093,059,600/369,478.50
6. Step 6: Final answer
   x = 839,272.27