Finding the Fourth Proportional to 8,877.86, 13,319.94 and 3,947.06

Step by Step Solution

1. Step 1: Write the proportion equation
   8,877.86 : 13,319.94 = 3,947.06 : x
2. Step 2: Convert to fraction form
   8,877.86/13,319.94 = 3,947.06/x
3. Step 3: Cross multiply
   8,877.86x = 13,319.94 × 3,947.06
4. Step 4: Simplify right side
   8,877.86x = 52,574,602.38
5. Step 5: Solve for x
   x = 52,574,602.38/8,877.86
6. Step 6: Final answer
   x = 5,921.99