Finding the Fourth Proportional to 55,535.80, 76,638.78 and 30,385

Step by Step Solution

1. Step 1: Write the proportion equation
   55,535.80 : 76,638.78 = 30,385 : x
2. Step 2: Convert to fraction form
   55,535.80/76,638.78 = 30,385/x
3. Step 3: Cross multiply
   55,535.80x = 76,638.78 × 30,385
4. Step 4: Simplify right side
   55,535.80x = 2,328,669,330.30
5. Step 5: Solve for x
   x = 2,328,669,330.30/55,535.80
6. Step 6: Final answer
   x = 41,930.96