Finding the Fourth Proportional to 8,870.16, 13,305.31 and 3,938.48

Step by Step Solution

1. Step 1: Write the proportion equation
   8,870.16 : 13,305.31 = 3,938.48 : x
2. Step 2: Convert to fraction form
   8,870.16/13,305.31 = 3,938.48/x
3. Step 3: Cross multiply
   8,870.16x = 13,305.31 × 3,938.48
4. Step 4: Simplify right side
   8,870.16x = 52,402,697.33
5. Step 5: Solve for x
   x = 52,402,697.33/8,870.16
6. Step 6: Final answer
   x = 5,907.75