Finding the Fourth Proportional to 55,578.33, 76,708.89 and 42,126.12

Step by Step Solution

1. Step 1: Write the proportion equation
   55,578.33 : 76,708.89 = 42,126.12 : x
2. Step 2: Convert to fraction form
   55,578.33/76,708.89 = 42,126.12/x
3. Step 3: Cross multiply
   55,578.33x = 76,708.89 × 42,126.12
4. Step 4: Simplify right side
   55,578.33x = 3,231,447,905.21
5. Step 5: Solve for x
   x = 3,231,447,905.21/55,578.33
6. Step 6: Final answer
   x = 58,142.23