Finding the Fourth Proportional to 55,899.78, 77,143.42 and 30,408.00

Step by Step Solution

1. Step 1: Write the proportion equation
   55,899.78 : 77,143.42 = 30,408.00 : x
2. Step 2: Convert to fraction form
   55,899.78/77,143.42 = 30,408.00/x
3. Step 3: Cross multiply
   55,899.78x = 77,143.42 × 30,408.00
4. Step 4: Simplify right side
   55,899.78x = 2,345,776,729.64
5. Step 5: Solve for x
   x = 2,345,776,729.64/55,899.78
6. Step 6: Final answer
   x = 41,963.97