Finding the Fourth Proportional to 5,731.31, 8,577.32 and 3,978.30

Step by Step Solution

1. Step 1: Write the proportion equation
   5,731.31 : 8,577.32 = 3,978.30 : x
2. Step 2: Convert to fraction form
   5,731.31/8,577.32 = 3,978.30/x
3. Step 3: Cross multiply
   5,731.31x = 8,577.32 × 3,978.30
4. Step 4: Simplify right side
   5,731.31x = 34,123,152.16
5. Step 5: Solve for x
   x = 34,123,152.16/5,731.31
6. Step 6: Final answer
   x = 5,953.81