Finding the Fourth Proportional to 8,870.66, 13,306.06 and 3,938.98

Step by Step Solution

1. Step 1: Write the proportion equation
   8,870.66 : 13,306.06 = 3,938.98 : x
2. Step 2: Convert to fraction form
   8,870.66/13,306.06 = 3,938.98/x
3. Step 3: Cross multiply
   8,870.66x = 13,306.06 × 3,938.98
4. Step 4: Simplify right side
   8,870.66x = 52,412,304.22
5. Step 5: Solve for x
   x = 52,412,304.22/8,870.66
6. Step 6: Final answer
   x = 5,908.50