Finding the Fourth Proportional to 199,404.60, 299,567.70 and 137,196.60

Step by Step Solution

1. Step 1: Write the proportion equation
   199,404.60 : 299,567.70 = 137,196.60 : x
2. Step 2: Convert to fraction form
   199,404.60/299,567.70 = 137,196.60/x
3. Step 3: Cross multiply
   199,404.60x = 299,567.70 × 137,196.60
4. Step 4: Simplify right side
   199,404.60x = 41,099,669,909.82
5. Step 5: Solve for x
   x = 41,099,669,909.82/199,404.60
6. Step 6: Final answer
   x = 206,111.94