Finding the Third Proportional to 8,178,318 and 12,830,492.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,178,318 : 12,830,492.50 = 12,830,492.50 : x
2. Step 2: Convert to fraction form
   8,178,318/12,830,492.50 = 12,830,492.50/x
3. Step 3: Cross multiply
   8,178,318x = 12,830,492.50 × 12,830,492.50
4. Step 4: Simplify right side
   8,178,318x = 164,621,537,792,556.25
5. Step 5: Solve for x
   x = 164,621,537,792,556.25/8,178,318
6. Step 6: Final answer
   x = 20,129,021.37