Finding the Third Proportional to 385,616 and 830,429.50

Step by Step Solution

1. Step 1: Write the proportion equation
   385,616 : 830,429.50 = 830,429.50 : x
2. Step 2: Convert to fraction form
   385,616/830,429.50 = 830,429.50/x
3. Step 3: Cross multiply
   385,616x = 830,429.50 × 830,429.50
4. Step 4: Simplify right side
   385,616x = 689,613,154,470.25
5. Step 5: Solve for x
   x = 689,613,154,470.25/385,616
6. Step 6: Final answer
   x = 1,788,341.65