Finding the Third Proportional to 386,518.50 and 830,178

Step by Step Solution

1. Step 1: Write the proportion equation
   386,518.50 : 830,178 = 830,178 : x
2. Step 2: Convert to fraction form
   386,518.50/830,178 = 830,178/x
3. Step 3: Cross multiply
   386,518.50x = 830,178 × 830,178
4. Step 4: Simplify right side
   386,518.50x = 689,195,511,684
5. Step 5: Solve for x
   x = 689,195,511,684/386,518.50
6. Step 6: Final answer
   x = 1,783,085.45