Finding the Fourth Proportional to 47,776.28, 65,920.56 and 28,913

Step by Step Solution

1. Step 1: Write the proportion equation
   47,776.28 : 65,920.56 = 28,913 : x
2. Step 2: Convert to fraction form
   47,776.28/65,920.56 = 28,913/x
3. Step 3: Cross multiply
   47,776.28x = 65,920.56 × 28,913
4. Step 4: Simplify right side
   47,776.28x = 1,905,961,151.28
5. Step 5: Solve for x
   x = 1,905,961,151.28/47,776.28
6. Step 6: Final answer
   x = 39,893.46