Finding the Fourth Proportional to 16,853,613.98, 25,213,904.72 and 12,986,136.18

Step by Step Solution

1. Step 1: Write the proportion equation
   16,853,613.98 : 25,213,904.72 = 12,986,136.18 : x
2. Step 2: Convert to fraction form
   16,853,613.98/25,213,904.72 = 12,986,136.18/x
3. Step 3: Cross multiply
   16,853,613.98x = 25,213,904.72 × 12,986,136.18
4. Step 4: Simplify right side
   16,853,613.98x = 327,431,200,258,534.06
5. Step 5: Solve for x
   x = 327,431,200,258,534.06/16,853,613.98
6. Step 6: Final answer
   x = 19,427,951.81