Finding the Third Proportional to 12,189,328.50 and 25,387,567.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,189,328.50 : 25,387,567.50 = 25,387,567.50 : x
2. Step 2: Convert to fraction form
   12,189,328.50/25,387,567.50 = 25,387,567.50/x
3. Step 3: Cross multiply
   12,189,328.50x = 25,387,567.50 × 25,387,567.50
4. Step 4: Simplify right side
   12,189,328.50x = 644,528,583,567,056.25
5. Step 5: Solve for x
   x = 644,528,583,567,056.25/12,189,328.50
6. Step 6: Final answer
   x = 52,876,463.50