Finding the Third Proportional to 385,668 and 830,602.50

Step by Step Solution

1. Step 1: Write the proportion equation
   385,668 : 830,602.50 = 830,602.50 : x
2. Step 2: Convert to fraction form
   385,668/830,602.50 = 830,602.50/x
3. Step 3: Cross multiply
   385,668x = 830,602.50 × 830,602.50
4. Step 4: Simplify right side
   385,668x = 689,900,513,006.25
5. Step 5: Solve for x
   x = 689,900,513,006.25/385,668
6. Step 6: Final answer
   x = 1,788,845.62