Finding the Fourth Proportional to 199,498.38, 298,997.73 and 99,686.58

Step by Step Solution

1. Step 1: Write the proportion equation
   199,498.38 : 298,997.73 = 99,686.58 : x
2. Step 2: Convert to fraction form
   199,498.38/298,997.73 = 99,686.58/x
3. Step 3: Cross multiply
   199,498.38x = 298,997.73 × 99,686.58
4. Step 4: Simplify right side
   199,498.38x = 29,806,061,131.46
5. Step 5: Solve for x
   x = 29,806,061,131.46/199,498.38
6. Step 6: Final answer
   x = 149,405.03