Finding the Third Proportional to 391,953.94 and 858,600

Step by Step Solution

1. Step 1: Write the proportion equation
   391,953.94 : 858,600 = 858,600 : x
2. Step 2: Convert to fraction form
   391,953.94/858,600 = 858,600/x
3. Step 3: Cross multiply
   391,953.94x = 858,600 × 858,600
4. Step 4: Simplify right side
   391,953.94x = 737,193,960,000
5. Step 5: Solve for x
   x = 737,193,960,000/391,953.94
6. Step 6: Final answer
   x = 1,880,817.84