Finding the Third Proportional to 12,189,546 and 25,387,987.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,189,546 : 25,387,987.50 = 25,387,987.50 : x
2. Step 2: Convert to fraction form
   12,189,546/25,387,987.50 = 25,387,987.50/x
3. Step 3: Cross multiply
   12,189,546x = 25,387,987.50 × 25,387,987.50
4. Step 4: Simplify right side
   12,189,546x = 644,549,909,300,156.25
5. Step 5: Solve for x
   x = 644,549,909,300,156.25/12,189,546
6. Step 6: Final answer
   x = 52,877,269.53