Finding the Third Proportional to 385,085.50 and 858,714.50

Step by Step Solution

1. Step 1: Write the proportion equation
   385,085.50 : 858,714.50 = 858,714.50 : x
2. Step 2: Convert to fraction form
   385,085.50/858,714.50 = 858,714.50/x
3. Step 3: Cross multiply
   385,085.50x = 858,714.50 × 858,714.50
4. Step 4: Simplify right side
   385,085.50x = 737,390,592,510.25
5. Step 5: Solve for x
   x = 737,390,592,510.25/385,085.50
6. Step 6: Final answer
   x = 1,914,874.99