Finding the Third Proportional to 12,782,058 and 17,978,818.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,782,058 : 17,978,818.50 = 17,978,818.50 : x
2. Step 2: Convert to fraction form
   12,782,058/17,978,818.50 = 17,978,818.50/x
3. Step 3: Cross multiply
   12,782,058x = 17,978,818.50 × 17,978,818.50
4. Step 4: Simplify right side
   12,782,058x = 323,237,914,655,942.25
5. Step 5: Solve for x
   x = 323,237,914,655,942.25/12,782,058
6. Step 6: Final answer
   x = 25,288,409.32