Finding the Fourth Proportional to 12,139,086.21, 18,217,617.84 and 5,749,358.37

Step by Step Solution

1. Step 1: Write the proportion equation
   12,139,086.21 : 18,217,617.84 = 5,749,358.37 : x
2. Step 2: Convert to fraction form
   12,139,086.21/18,217,617.84 = 5,749,358.37/x
3. Step 3: Cross multiply
   12,139,086.21x = 18,217,617.84 × 5,749,358.37
4. Step 4: Simplify right side
   12,139,086.21x = 104,739,613,609,865.33
5. Step 5: Solve for x
   x = 104,739,613,609,865.33/12,139,086.21
6. Step 6: Final answer
   x = 8,628,294.73