Finding the Fourth Proportional to 6,439.86, 8,886.24 and 3,607.38

Step by Step Solution

1. Step 1: Write the proportion equation
   6,439.86 : 8,886.24 = 3,607.38 : x
2. Step 2: Convert to fraction form
   6,439.86/8,886.24 = 3,607.38/x
3. Step 3: Cross multiply
   6,439.86x = 8,886.24 × 3,607.38
4. Step 4: Simplify right side
   6,439.86x = 32,056,044.45
5. Step 5: Solve for x
   x = 32,056,044.45/6,439.86
6. Step 6: Final answer
   x = 4,977.75