Finding the Fourth Proportional to 21,009,469.74, 28,995,297.15 and 12,314,947.34

Step by Step Solution

1. Step 1: Write the proportion equation
   21,009,469.74 : 28,995,297.15 = 12,314,947.34 : x
2. Step 2: Convert to fraction form
   21,009,469.74/28,995,297.15 = 12,314,947.34/x
3. Step 3: Cross multiply
   21,009,469.74x = 28,995,297.15 × 12,314,947.34
4. Step 4: Simplify right side
   21,009,469.74x = 357,075,557,509,902.06
5. Step 5: Solve for x
   x = 357,075,557,509,902.06/21,009,469.74
6. Step 6: Final answer
   x = 16,995,933.83