Finding the Third Proportional to 391,030.50 and 856,800

Step by Step Solution

1. Step 1: Write the proportion equation
   391,030.50 : 856,800 = 856,800 : x
2. Step 2: Convert to fraction form
   391,030.50/856,800 = 856,800/x
3. Step 3: Cross multiply
   391,030.50x = 856,800 × 856,800
4. Step 4: Simplify right side
   391,030.50x = 734,106,240,000
5. Step 5: Solve for x
   x = 734,106,240,000/391,030.50
6. Step 6: Final answer
   x = 1,877,363.12