Finding the Fourth Proportional to 21,023,162.16, 29,007,630.72 and 12,080,544.60

Step by Step Solution

1. Step 1: Write the proportion equation
   21,023,162.16 : 29,007,630.72 = 12,080,544.60 : x
2. Step 2: Convert to fraction form
   21,023,162.16/29,007,630.72 = 12,080,544.60/x
3. Step 3: Cross multiply
   21,023,162.16x = 29,007,630.72 × 12,080,544.60
4. Step 4: Simplify right side
   21,023,162.16x = 350,427,976,653,290.06
5. Step 5: Solve for x
   x = 350,427,976,653,290.06/21,023,162.16
6. Step 6: Final answer
   x = 16,668,661.64