Finding the Fourth Proportional to 199,667.61, 299,561.55 and 115,408.56

Step by Step Solution

1. Step 1: Write the proportion equation
   199,667.61 : 299,561.55 = 115,408.56 : x
2. Step 2: Convert to fraction form
   199,667.61/299,561.55 = 115,408.56/x
3. Step 3: Cross multiply
   199,667.61x = 299,561.55 × 115,408.56
4. Step 4: Simplify right side
   199,667.61x = 34,571,967,116.87
5. Step 5: Solve for x
   x = 34,571,967,116.87/199,667.61
6. Step 6: Final answer
   x = 173,147.60