Finding the Third Proportional to 19,890,560 and 28,075,388

Step by Step Solution

1. Step 1: Write the proportion equation
   19,890,560 : 28,075,388 = 28,075,388 : x
2. Step 2: Convert to fraction form
   19,890,560/28,075,388 = 28,075,388/x
3. Step 3: Cross multiply
   19,890,560x = 28,075,388 × 28,075,388
4. Step 4: Simplify right side
   19,890,560x = 788,227,411,350,544
5. Step 5: Solve for x
   x = 788,227,411,350,544/19,890,560
6. Step 6: Final answer
   x = 39,628,216.17