Finding the Fourth Proportional to 35,931.84, 49,588.56 and 20,828.40

Step by Step Solution

1. Step 1: Write the proportion equation
   35,931.84 : 49,588.56 = 20,828.40 : x
2. Step 2: Convert to fraction form
   35,931.84/49,588.56 = 20,828.40/x
3. Step 3: Cross multiply
   35,931.84x = 49,588.56 × 20,828.40
4. Step 4: Simplify right side
   35,931.84x = 1,032,850,363.10
5. Step 5: Solve for x
   x = 1,032,850,363.10/35,931.84
6. Step 6: Final answer
   x = 28,744.71