Finding the Fourth Proportional to 21,988,407.31, 30,343,990.35 and 12,065,355.16

Step by Step Solution

1. Step 1: Write the proportion equation
   21,988,407.31 : 30,343,990.35 = 12,065,355.16 : x
2. Step 2: Convert to fraction form
   21,988,407.31/30,343,990.35 = 12,065,355.16/x
3. Step 3: Cross multiply
   21,988,407.31x = 30,343,990.35 × 12,065,355.16
4. Step 4: Simplify right side
   21,988,407.31x = 366,111,020,544,362.75
5. Step 5: Solve for x
   x = 366,111,020,544,362.75/21,988,407.31
6. Step 6: Final answer
   x = 16,650,183.68