Finding the Fourth Proportional to 123,609.78, 185,266.35 and 56,958.42

Step by Step Solution

1. Step 1: Write the proportion equation
   123,609.78 : 185,266.35 = 56,958.42 : x
2. Step 2: Convert to fraction form
   123,609.78/185,266.35 = 56,958.42/x
3. Step 3: Cross multiply
   123,609.78x = 185,266.35 × 56,958.42
4. Step 4: Simplify right side
   123,609.78x = 10,552,478,575.17
5. Step 5: Solve for x
   x = 10,552,478,575.17/123,609.78
6. Step 6: Final answer
   x = 85,369.29