Finding the Fourth Proportional to 49,087.72, 67,742.82 and 28,935.40

Step by Step Solution

1. Step 1: Write the proportion equation
   49,087.72 : 67,742.82 = 28,935.40 : x
2. Step 2: Convert to fraction form
   49,087.72/67,742.82 = 28,935.40/x
3. Step 3: Cross multiply
   49,087.72x = 67,742.82 × 28,935.40
4. Step 4: Simplify right side
   49,087.72x = 1,960,165,593.83
5. Step 5: Solve for x
   x = 1,960,165,593.83/49,087.72
6. Step 6: Final answer
   x = 39,931.89