Finding the Fourth Proportional to 35,401.84, 48,856.80 and 21,057.76

Step by Step Solution

1. Step 1: Write the proportion equation
   35,401.84 : 48,856.80 = 21,057.76 : x
2. Step 2: Convert to fraction form
   35,401.84/48,856.80 = 21,057.76/x
3. Step 3: Cross multiply
   35,401.84x = 48,856.80 × 21,057.76
4. Step 4: Simplify right side
   35,401.84x = 1,028,814,768.77
5. Step 5: Solve for x
   x = 1,028,814,768.77/35,401.84
6. Step 6: Final answer
   x = 29,061.05