Finding the Fourth Proportional to 7,051.76, 9,731.39 and 3,865.05

Step by Step Solution

1. Step 1: Write the proportion equation
   7,051.76 : 9,731.39 = 3,865.05 : x
2. Step 2: Convert to fraction form
   7,051.76/9,731.39 = 3,865.05/x
3. Step 3: Cross multiply
   7,051.76x = 9,731.39 × 3,865.05
4. Step 4: Simplify right side
   7,051.76x = 37,612,308.92
5. Step 5: Solve for x
   x = 37,612,308.92/7,051.76
6. Step 6: Final answer
   x = 5,333.75